Fix Servo Mounts and Linkage

I have a 3D-printed box with a motorised lid and a motorised deadbolt. Everything is already modelled and printed. Two parts don't work and I need them redesigned: The mount and linkage that lets a DS3218 servo swing the lid open about 90°. The mount and linkage that lets an MG90S servo throw the deadbolt. Both servos work fine on the bench. The problem is purely how they're held and how the motion reaches the lid and the bolt. The box body is already printed and I'm not reprinting it, so the new parts have to fit what exists. Nothing can stick out of the box. I'll send you the STLs and measurements. I need printable files back plus a plain-English note on how to assemble them. Looking for someone comfortable with 3d modeling and hobby servo linkages.