THE TOUGHARMOR MB842MP-B
At 120.8mm in height the MB842MP-B is a full height PCIe card (171mm in length).
As expected, you can easily slide out both drive trays from the rear of the card.
Both drive trays are made out of aluminum and are tool-less in design.
Just press the far end of the top and pull it out to reveal the M.2 PCIe NVMe SSD area.
Once you place the thermal pad in the interior (either cut it in size or used it all) just place the drive on it and then slide the aluminum clip on the other end to secure it.
Afterwards just mount the piece your removed earlier and that's it, your M.2 PCIe NVMe SSD is ready.
The card also has 2-pin headers for each drive which you can connect with your case for the front panel activity LEDs.
Here you can see the card mounted on the primary PCIe 5.0 slot of my AMD 7900X/ASRock X670E system.