Anchor points for rear seat belts.

Hey guys, many months ago I found a drawing of the anchor points for a rear seat in a kombi but now for some reason can't find it anywhere on the net.
The guy putting in the seat belts doesn't know where on the kombi to place the anchors. He thinks the only place is up high.
Any ideas or diagrams showing the anchor points would be great.

Thanks

Dan

1974 KOMBI