Clip that can hold a 12mm x 3mm magnet.
I used this for retaining wires in an ATM that could not have holes drilled for fasteners and 3M could not be used due to extreme temperatures.
This solution allowed for a method that was reusable, flexible and non-damaging.

.3mf file was sliced in Cura, but you may want to re-slice to add a pause command on your printer as the file provided does not have that at this time.

Hope someone else!