Mk3 starter into Mk1 - Pin 15a wiring

Quick question.

I am installing a mk3 starter as part of my 5 speed swap. The Mk3 starter doesn't have the second spade terminal on the starter solenoid (pin 15a) for the points ignition system. I know that it supplies +12v while cranking.

Am I able to simply replace the the spade on the wire with a ring terminal and connect it to the post on the solenoid that goes to the starter motor brushes? or does it need to be shielded or similar?