Certainly do!
For location reference that's the auxiliary battery in this pic.
In this bundle (green circle) there are three wires with a plastic cap over each. One is earth, one is constant +12v, the 3rd is ignition switched +12v. You only need the switched +12v.
I think from memory you need the white wire but confirm with a voltmeter with ignition ON/OFF. I pushed a sewing pin through the plastic cap as a temporary probe.
Slice the cap off when you're ready. Don't cut the wire off behind the cap or you will be short on working space.
Keep in mind there may be a fix for the dead NATO socket with software update xx1946, so either wait for that to be confirmed, or know that you might be able to reverse your workaround later if this gets fixed by Ineos. Bottom line is don't do anything too permanent.