one should be careful of cutting the wires for this reason should the system not function you could be liable as you have modified the manufacturers system.
all the problems i have had in the pass have been over come by
1/moving the seat forword checking for free play in the cable and giving it alittle extra under the squab( you know the knee in the seat to get something from the rear one)
2/move the seat rearwards and recheck for freeplay
3/ fit a clip that is supplied by the dealer that holds the connector together