Without the wiring in place, including the connection to the SDM [Sensing Diagnostic Module] it should not be possible to deploy the airbag.
Do keep in mind though that with integrated seatbelts to the seats that you will be concentrating a very large load on the seat anchors. On new production vehicles, this results in added structure in the floor pan and is part of the reason a majority of vehicles have the seat belt anchors separate from the seat.
Hate to be in a frontal crash and have one of those seats come loose with someone in it who is strapped in and contacts a metal dash....
