Is your door panel still on? I know how #85 panel cap mounts and is the same as the cap on the rear panel. To remove, you remove the two chrome pates (#108 and #104). Those hold the cap at the ends. There are spring clips (#002 988 45 78) that are fixed into the cap and then press into slots in the door. So just pop the cap upwards off the door. If you need new clips buy from Authentic or other repudiable supplier. Some on EBay are bad copies and do not work. Ask me how I know.
The chrome strip on the cap is press fitted to the cap and comes off with the cap. The door panel is held on to the door frame at the ends by the chrome panels and at the bottom by a chrome rail. it is then screwed to the door frame along its upper edge. They are tiny screws and usually snap off. You can make new screw holes if needed as these are covered by the chrome trim strip. The arm rest and handle also help secure the panel to the door frame.
I wasn't able to take pics of my panel-less door but will in the next day or so.