That is correct under the chair, we have also found numerous bolts and clips in our vans left over from the build. I have just put them in a drawer in case I ever find where they came from!
Funnily enough we wondered the same thing about the exposed electrics under the passenger seat and were going to add it to a (very small) snag list for the vw dealer...
Ours wires hang down and touch the carpet!! Had to be careful with the rubber floor mat when putting it in place - didn't want to move them or force the mat under them