Cover in place - could fine tune the mounting hardware but acceptable already

COVER INSTALLED ONTO REAR OF 1130

The mechanism has a groove on the bottom mounts, allowing the cover to be placed onto the raised ridge inside the IBM 1130 display box. On the two sides are mounts with a rotating lever to either hold the cover behind the raised side ridge or allowing the cover to tilt out if the lever is oriented vertically. 

The lever has detents that lock hold it either vertically or sideways to extend behind the ridge. A spring holds the side screw heads outward, which pulls the lever against its stop plate inside so the lever locks into one of two orientations, vertical or sideways. To operate the cover, the screw is pushed forward against the cover, moving the lever out of its lock, rotated ninety degrees to its intended orientation and released. 

The change I anticipate making is to swap the screws on the sides with longer versions that allow me to install a locking nut on the inside end. The lever has a nut epoxied to the part but the screw therefore not only rotates the part but loosens or tightens. Using a second nut to jam against the first will keep the nut purely rotating with the screw head rather than having the screw threads move in or out.