First of all nice job and the seats look great in there. What Im looking to do is add rear shoulder/lap belt to the back seat. Did you mount the rear retractor to the parcel shelf or floor? Any pics?
It wasn't me who did it, although I plan on doing something similar. It looks like from pics on google, the retractor is in the seat side bolsters, hard to tell. Your options are: Look thru the images on the goog. PM the guy who did it and ask, or take a look at a junkyard who has one.