This is a side spool holder mount that uses the original spool holder that comes with the P1P. It doesn't use any screws or nuts, it just clips into place. Do not print with too many walls or infill as it won't be flexible enough to snap onto the printer. 2 walls and 10% infill is plenty.
Print in PLA as TPU and PETG will be too flexible, rattle, and potentially fall off.
This will have to go on the right hand side as the light and camera are in the way. This poses a problem if you want to have a cable chain or keep the PTFE tube in the normal place. I am currently working on designing a way to get the filament to the toolhead that lets the PTFE tube take the same path along the toolhead cable. As a temporary solution, I have pushed the PTFE through one of the holes in the side (as shown in one of the photos).