I had one and it was great. I rode a scooter everywhere at the time, and I could pull this out of my pocket, let it spring open and stick it up inside my helmet for some easy one hand to hands free calls.
You probably want to slip some conduit around the wire to protect it from the mortar, patch the hole, then use a surface mount box screwed to the wall with the wire fed in the back.
If you have enough data: Tapes. Tapes are so hilariously cheap to keep. Write them and keep them in a fire proof box. No power needed to keep platters spinning. 45TB/tape!
The actual truth is Star Fleet is all infiltrators, but no infiltrators know that, and they don't want to blow their cover