Make sure there is no support structure left before installing.
Remove the top bar to get the hot end cables to the front. Move hot end to the right to make sure the cable is long enough.
Place the part without fixating it.
Add the `cableChain_XendCover` (from "Ender 3 Cable Chain", link in the summary) now.
Snap the part to the wheel axis by placing it from above and pushing it to the left (away from the metal bar).
Add other chain elements.