Here's a few pictures showing how the dealer tried to remove the Schwintek slideout motor that failed with the slide IN.
1) This is the starting point. Two holes covered in silicone. There was another hole in the slideout flange which didn't seem to align with anything important.
2) Same view but with weather seal removed and that exposed screw which now seems to be the MYSTERY SECURITY SCREW
3) Silcone removed. Top hole looks aborted and lower hole exposes part of the motor.
4) Hard to see screw head was a 5/16" hex (Allen) screw, but it now turns out that it's a gearbox screw.
5) Can insert a hex wrench but couldn't see how that could be the security screw, so didn't try to remove it.
6) This was to give it's location (if it was the security screw).
7) Moved the slide in a bit (new motor was still working
and removed the interior weather seal. What an amazing mess the dealer made siliconing it. The base of the seal is actually screwed to the wall and the flexible seal just snaps in over indents in the base, so no silicone was necessary.
8) You can see that the position of the hole on the outside aligns with the gearbox case screw. The security screw is intended to be at the 3" mark where you can see part of a slot about 1/4" wide. There are series of these slots around the motor case. Judging by the amount of silicone on the motor I'm guessing that they never found the security, screw and this one is held in with silicone. The damage to the motor didn't seem consistent with the problem (a seized gearbox) so I suppose brute force got it out.
What I think is needed now is to measure the exact location of that top screw under the outside seal and then plot that position on the slide out flange. Drill a large hole , say 1", to allow a grommet (like the ones on the Lippert power nose jack) to be fitted and provide on-site access to the security screw.
As soon as I can buy a couple of grommets, I'll do the work and post pictures, video, etc.