I purchased an extra 4 pin cable as a spare, I cut the original cable and extended it by about 12 inches with an old Cat-5 Ethernet cable. The Cat-5 cable has 8 wires in 4 twisted pairs so I just soldered each of the 4 wires in the Bambu cable to a twisted pair in the Ethernet cable. I did that at each end along with some shrink tubing and I have a longer 4 pin cable and I have much more flexibility in placing my buffer or hub. I think the bambu wires inside the cable were red, Black, Purple and White.
Two of the pins in the cable are reversed so if using a different cable check the continuity from end to end pin by pin and make sure that it’s the same with the new cable as the original.
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