There are only 2 used terminals on the RST starter.

Why have you got a black wire on the starter? The black battery cable should be bolted to the bell housing.

You should have a red battery cable to the starter and then a smaller red pair on the same terminal going to the alternator. Then the black/red smaller wire goes on the spade terminal.

If you fit them on wrong you could do damage to the starter and/or the wiring harness in the car....