Tailgate latch location.

I've made a tailgate for my Series 3 and want to add Antiluce latches but need a location for mounting hole; I'd like to get as close to original location as possible as I may one day get a Land Rover tailgate and would like the latches in the right spot.

Anyone with these latches installed on their truck willing to provide dimensions from the side and bottom of the plate? I'd appreciate it.

Thanks for any help. Tom
Attachment 13682

look inside. the 'frame' metal has the hole stamped in it (blanked) at the factory but models with the door had the skin put over this hole. you can see the hole for the tail gate fixings from the inside.