So Rick76, yes this is the wagon and the back seat is solidly carpeted under..Now the driver and passenger footwell both have tons of wiring and components. There is a wiring compartment with a snap on cover under the left of the drivers footwell.. and it looks like a LOT of wiring in the passenger rear fender well by the CD player and some in the drivers fender well by the spare tire..Nothing opens up under the rear floor at all or back seat..where the midget seats are...Everything very tightly bundled..

May be able to reverse trace from below to where it enters the chassis interior and up to the relays..