Door switch wiring 2005 camry

Ok i found the wires for the passenger and driver doors here is the question I have one postive and negative wire from the alarm module . Would I be able to use a chassis ground for the negative and the two single wires on the door switchs which I believe are positive and splice them together with the one positive wire from the mudule. Seeing how both are switchs and there grounded to the chassis .. I dont know you tell me am I wrong ...