This is a tray to hold a Raspberry Pi 3B+ in the standard drawer location of a Creality Ender-3 S1.

The nubs that the Pi fits on are intended to be melted with soldering iron to fix the pi in place with no hardware (hot glue works too).

The long slots on the sides are to allow the the drawer to open with wires going to either the screen or for power. The metal box the drawer slides into will need holes drilled in whatever location for the wires you choose.