Inspired by other outside mounts I made this one.
It doesn't need any new holes, but recommend a little double sided tape to aid the screws in the original mount holes.
PLA works for me, standard settings with support activated.

I could shorten the PTFE filament tube down to 35cm and it's more inline with the slot in the top. That slot can be narrowed to 8mm and possibly even 6mm.
I'm using a cover with 8mm with no problems.

A longer standard Nema 17 motor cable is needed.