Good news on the video---maybe link us here too should anyone need/want that sort of tutorial?
Not sure about SMB battery set-ups as I don't own one---wouldn't want to give you bum advice about that. You simply need to disconnect the vehicle wiring negative terminal(s)----as I understand it the SMB's have separate battery systems.
Basically if you disconnect what you think are the starting battery(s) and things like wipers, PDL, PW etc etc including the starter itself you're safe to work on and around the air bag system.
HTH