Thanks for those images, confirms m y assumption over the choice of spindle. Also indicates you have a small setup issue with Mach3 which is unimportant at this time. Your first post shows the VFD illuminating the FORward LED - I'm assuming you can drive this with an M3 command and extinguish it with an M5... thats really the last bit that would convince me that you have Mach3 control onto the VFD and that the problem lies in the VFD/wiring/spindle.

Actually, you can check the continuity of the loom and spindle through those three sockets on the connector in the photo - just check for a couple of ohms between each pair (1-2, 2-3, 1-3).