Ender-5 rear mount

Brackets to mount the electronics case vertically inside the back frame.

# Requirements:
- 4 M5 screws (the ones from the case can be used, but they are a bit long)

# Install:
- remove the power cord
- remove the 6 screws from the electronics case
- slide it on the right side through the frame to the back (or simply detach the cables)
- screw the bottom bracket on with 2 M5 screws
- place it into the frame with the top part first (tilted forward) then let it slide down
- slide the top parts A and then B from the left into place (if it's stuck just wiggle a little)
- make sure you removed the power cord
- open the electronics case and be sure to have one hand below the cover when you loose the last screw as it can slide down really fast (it has a fan cable attached which might rip)
- loosen the power cord socket and push it a little outside (top left, two screws from the outside) as this is in the way of the screw hole
- put in the 2 top screws (no need to tighten thes