Maybe 70 is a quite a acceptable signal on your satmeter. You have found a satellite. Mark and record the azimuth and elevation angles so you can always get back to this satellite. If your elevation is about right then it it likely to be the correct satellite. The adjacent satellites will be to the upper left and lower right as viewed facing forwards towards the satelite in the sky. They are in a line at approx 49 deg slope.
The reason with the satmeter does not say "W6 found" is probably due to:
Misunderstanding about the type of LNB and its local oscillator frequency.
Wrong polarisation.
Wrong satellite.
Wrong satmeter tuning.
I suggest:
Turn off the AC mains power at the wall switch. Connect up the power supply module to the HX modem. Connect one coax cable from the LNB to the modem receive RX socket.
Note the information from Bentley Walker:
Load the sbc.cfg file if told to do so.
Input the manual commissioning information (tuning, symbol rate, IP addresses etc) into the modem screen.
Check carefully that all the parameters are correct. The LNB type pull down menu content comes from the sbc.cfg file and is important.
Look for the signal quality on the moden screen.
If it is maxed out at 29 you are pointed at a very strong satellite power. The config, polarisation or satellite are wrong. Once correct the reading will go into the range 30 to 100. Peak up.

As shown, the transmit polarisation, from the BUC on the left, is vertical. Receive polarisation is Horizontal. The white part is the Hughes universal LNB/OMT PN 1501882-0002.
Polarisation.
There are two starting positions, one called horizonantal and one called vertical. The universal LNB connector needs to be pointing either sideways or up/down. You can alter this by turning the entire dish 90 deg either way. One position will be with the feed arm at the bottom, the other with the feed arm at the side.
Having set a start position adjust the polarisation by:
Turning the dish clockwise by an amount of +48 deg clockwise, as viewed standing behind the dish and facing forwards towards the satellite in the sky ( or, starting with the wrong starting position, by turning the dish 42 deg clockwise while standing in front of the dish and facing towards the dish, with your back facing the satellite. *) You may need to make some final small adjustment to the polarisation under verbal instruction from the hub. A maximum of +/- 5 deg final adjustment may be done at the feed yoke (that is what the 505 is for).
The two possible final polarisation positions are at 90 deg from one another. One will work perfectly (SQF= peaked at about 92) the other will give just noise power (SQF= range about 10 to 29 max)
Once you have peaked up, with say SQF=92, power off at the AC mains wall switch and connect a second coax cable from the modem TX out to the IFL connector on transmit BUC module at the dish. Turn the power on while taking to Bentley Walker, who will commission your site. Do not interfere with the antenna during this process.
* I prefer to always to describe polarisation adjustment as (+) clockwise when facing forwards towards the satellite in the sky. If you are northern hemisphere and face due south, towards the equator, the satellite at the top of the orbit has its horizontal horizontal and its vertical vertical. If you look south west the satellites are lower down, tilted to the right, clockwise (+) . If you look south east the satellites are lower down, tilted to the left, anti-clockwise (-). Always think in terms of the amount of adjustment and the direction. Ignore scale numbers if they don't make sense, for example go backwards from 90.
Best regards, Eric.