I have a bit zero v1 for my Shapeoko 3. I had to reassemble and I removed from the controller. Where are the instructions for installation on a Shapeoko 3, expecially where to plug into the board.
It also seems that the docs.carbide.com/assembly is now forwarded to the getting started page. I searched through there but could not find anything.
When I added a Bitsetter I found the additional wires and splitter PCB was like stuffing the proverbial 5 lbs of stuff into a 1 lb bag. My solution was to move the splitter board to an external location on the cover of the controller enclosure. See this project from CutRocket
Note that if one has proximity switches, instead of using the splitter one can plug one accessory into the Reserved header, the other into the P(robe) input on the PCB Expansion Adapter for the proximity switches.
Don’t feel like your the only one trying to figure out where the Bit zero plugs in on the 5 Pro. buy the images you upload I can see how they match. The Bit zero that I was sent has a small 3 pin white connector that wont fit into the larger 3 pin black connector as show on you image.