What wire goes where on my soleniod 14.5 engine both post are the same size with no markings. Have the battery cable & the big wire that goes to the starter & a small wire with fuse all are red. With my small black wire sliding onto the small size post off to the size small red wire goes to which post & the other 2?

Hi,
The solenoid does not care. The trigger wire(one to the small post is correct0 and the large wires may be hooked to either post BUT the smaller red wire with the eyelet must go on the same post that the battery hooks up to.
Peace,
Clarke