New 2 CNC start* LR3 build

OK lets talk drivers for dummies.

  1. The SKR Pro instructions show 6 drivers the text notes that lowrider has 5 drivers. It does not say which port they need to be put in. Since I am missing a driver does it matter where I plug in the five drivers??? From what I have been able to piece together it looks like I would leave out the driver to the far right E2 UART.
    2.FANS Doug Joseph shared a diagram with me where he attaches the fans to the main power supply but I think he is using a different fan than what came in my kit. My kit came with two BTT 12v fans that have a plug installed on them. Do they plug into the board somewhere or is it best to cut the plug off and direct wire them as Doug showed?
  2. I am sure someone will point out the obvious but I have not seen or found it, SOOO… How do I determine X1, X2, Y1, Y2 which side is which??