The Dispatch | Expert | Scudo Hub

Hello everyone,
Newbie on here & 1st post, hope someone can help! I've got a 65 plate Proace (yeah, it says Toyota on the back but it's basically a rebadged Dispatch, built in the same factory in France!) I've got an issue with one of the side door handles. It opens fine from the inside but not outside. I stripped the panels off & got my hand up between the door skins. The cable that operates the lock is still connected to the outer handle but the thing that holds the cable end in position (yellow plastic thing with a hook thing on it) has come adrift. I've no idea how it's meant to go back together as I can't really see up there. The inner handle assy is riveted on so I'm nervous about drilling it out to get better access.
Has anyone had a similar problem, and more to the point, been able to fix it?
Thanks in anticipation, Pete