Pathfinder R50 Roof Rail Loose

[Schneidereit]

Hey everyone I have a 1999 Jan Build R50 Pathy and my rear drivers side (Right) roof rail holding point is working loose. The Pathy has 6 such points on mine - 3 on each side that hold the rails in place int he channels that run the length of the vehicle. I need to somehow get access to the nuts / bolts etc to firm up and maybe reinforce to ensure the roof rack thats installed on these rails stays safe. Any Ideas ? Do I need to get access through the removal of the roof lining or have I missed something ? I cant seem to find the rails to show in the online manuals - I see the BT file for Body and Trim for my year but it looks like thats a whole roof rack fitted - my model just has the two rails. - Cheers Mark