1. Start by unplugging all conectors from the toolhead board.
Source: Bambu Labs Wiki
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2. Prepare the cables.
The cables that are required are as follows:
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3. Route the Cables.
If you wish to route a nylon sleeve, route the wires on the toolhead side, place them through the sleeve and plug into the mainboard. Make sure all connected cables are the right length if the toolhead is lifted to its maximum z direction (vertically)