Umbilical add plug square slot for XT30

[ArdaFu]

Mellow's SB2040 uses XT30 plugs. As the XT30 plugs are slightly larger in size than the M12 holes, would it be possible to add a square slotted hole in the mount to allow the plugs to pass through more easily.

\Voron Mods/Voron 2-Trident/2.4/CW2_CAN_Umbilical/STLs/CW2/cw2_umbilical_m12.stl

[hartk1213]

cad is available, feel free to make the change and submit a Pull request 👍🏻