This should be 8x M5x10 screws, otherwise the screws hit the extrusion and the rod holders can’t be tightened. I don’t think this is just an issue with the MK2.5S rod holders… I think we use the same part in both sets.
The wires are red, white and blue. This should read “The blue wire of the cable should be on the right.“
The plug only goes in one way so the color could be ignored as long as we warn the user to ensure the plug is oriented correctly.