SD Card Adapter Holder (Ender 3/3Pro)

Any of the other ones I found didn't have a large enough slot at the back to fit the ribbon cable through.

You'll have to remove the end cap to slide the adapter on. The pictures show it on the inside because I have used another mod to put the motherboard in the back. If your's is still stock, then you can slide it on the outside.

Also in the pictures you can see the ribbon cable retaining clips I made.