I knew you were gonna day that!!! Ok noted..... no boot till job done !
I think as long as you have covered any bare wire it won’t hurt. There could be wires that are broken or breaking inside their pvc casing but if not exposed then it shouldn’t be a problem.
I really don’t see why any of this would effect the airbag ecu it’s just feed for the electrics to the hatch? If someone knows differently please enlighten me.