Why is this wire so critical? 2011 WK2 Laredo CRD

[mlenser]

While doing mods to the trailer plug wiring I had to remove the whole rear compartment flooring to lift up the carpet. To remove the base I had to unplug a wire just next to the tail door catch. Later when the wiring was completed I tried to test if I had done everything correctly and attempted to start the car. Neither of my key fobs were recognized. After some initial panic I reconnected this plug and everything was fine. Tried it a second time and the car will not recognize the keys. Not even when inserted in the dash board! It would be a pretty effective security mod to fit a switch in the loom if the Canbus system doesn't have a heart attack. Anyone know what this wire is for? Seems to lead to a device just next to the latch that you lift the rear floor to access the spare wheel. Might be a key fob sensor/antenna? I've included a pic of it's location.

[bikemat]

Maybe just part of the pci bus or whatever it's called. It uses the same wires to send all sorts of different signals throughout the car, so that a separate wire isn't needed for every single sensor and function. Means there're way less wires throughout the car but the downside is that if there's a faulty connection somewhere, it all stops working. Could be what you did there by disconnecting that wire

[jzp]

I think it's for the wireless key module