These mounts are 2cm extended so they clear the backplate when you reroute the dragchain to go to the front of the machine.

Will fit with original screws.
You can remove 6-8 brackets of the drag chain .

Take care; the Ymotors and Y limit switch should NOT be routed through this; you can route them through the bottom opening of the extrusion.

Print them in PETG standing up, 3 or 4 walls, 25% adaptive infill.