I built these Brackets for my Ender 5 Plus. I upgraded to the MicroSwiss all metal Hotend and the Exoslide Linear slides. I also attached a drag chain to the Rear of the X axis to carry the wires. I built an enclosure around my Ender 5 Plus. After do that I placed my Spools in a Zip Lock container (with Filament drier inside) on top of the case. Then, I just routed the filament from the Container through the top of the Case with Capricorn tubing (Stopping just inside the Case) This Bracket is designed to attach to the Exoslide 40P Bracket coupled with a 20P Bracket in an L Shape Configuration. along the Y axis. This Bracket then provides the ability to upgrade the 2020 X axis rail with a 2040 rail. The Bracket is used for both the right and left. Just use a spacer for the cutout not being utilized.