Heater Catridge and Thermistor Wago Connector Mount for MK3/S/+

I recently had to replace the heater cartridge and thermistor on my Prusa MK3S+, and I realized it's a pain to undo the cable bundle and unplug the connectors from the Einsy RAMBo board. As I'm often messing around with the hotend assembly, I made a mount to hold four connectors that should make my life easier the next time I swap the heater or thermistor.

The connectors I used are four 2-position Wago 221 lever-nuts. The pros of this choice are that no crimping or soldering is required for a secure connection that can easily be disconnected. Additionally, the connectors are more than capable of passing the required voltage and current. The main con is that they are bulky, so the mounting system needs to be creative to prevent interference with the printer. To achieve this, I modeled a clip to secure the four connectors above the end of the cable holder, utilizing the back two of its six zip-tie holes.

The lever-nuts slide can either clip into the channel or slide in from the side. However, the tolerances for a compliant fit are tricky here, and your printer may produce slightly different dimensions than mine. Therefore, I recommend using an additional zip tie around all four connectors lengthwise to prevent anything from coming loose. Alternatively, you can copy and modify my Onshape model to fit your setup perfectly.

I've tested my design on an MK3S and an MK3S+, and they didn't interfere with their motion. If you position the zip-tie heads as I've shown in the picture, you should be okay. However, I'd recommend running a self-test to double-check after you've installed it. I can't be responsible or make any guarantees for your own printer's safety.