Nissan Patrol 4x4 (Africa)

When I got my Y61 the rear barn doors were a little rattley. I could not see how to adjust the catches, so I placed some spacers behind the little rubber bumper located inside the fork that is intended to support the inside edge of the larger right hand door. This got rid of the rattle, but there are still squeaks, presumably caused by the seals moving relative to the bodywork. The squeaks seem to be coming from the smaller left hand door. Any ideas on how to adjust the doors properly? Like I said, there is no readily apparent way or I am missing it...

Gerrit my door would stuck closed and needed adjustment of the fork to lift the door ever so lightly when closing. This fixed the problem.

Here is the worshop manual page wrt the barn doors.

Gerrit, did you manage to sort out the squeak?