Rear Static Seatbelts

[john p]

Hi all,I've just bought some static belts for the back of my 1968 Mini,they are out of a 1993 Mayfair apparently.Would anybody on here be able to give me some measurements as to where the bolt holes need to be.I assume the top corner bolts go into the rear shelf and the release clips towards the back centre of the seat cussion,but I'm not to sure about the lower mouting bolt.Any tips?Cheers John.