I have an HP Z840 server. The video cards are short, and the power cables don't allow for the PCIe cover to go on. This means that the PCIe cards are not held down by the retention lever.

This little wedge solves that issue. It twists into place and holds the PCIe retention lever down keeping the PCIe cards in place.

I printed it in PLA+ with 15% Gyroid invill, 4 wall loops, and 4 top & bottom layers. If it's too tight or too loose you can simply scale as needed.