Heres a few pics.....
The rear selt belt mounts are the fixing point for the back strap......
The seatbelt rail holds one side of the harness, I just unscrewed the rail, slipped the clip over it and screwed it back in......
The inside clip had to have a braket made for it as can be seen in the pic, just bolt the brack to the seat mounting bolt and clip the harness in
Ilan.