1970 Chevrolet C20 Pickup - Starter Solenoid Wire Connector

[ggalv]

Hi,

I am looking into getting the wire connector for the wire that connects to the solenoid. The truck is 1970 Chevrolet C20, 3/4, 5.7. It has 3 wires that connect to the solenoid. It is one of the two smaller wires. One has an "S" next to it and the other has an "8" next to it. It is the wire that connects next to the "8". For what gauge should I buy the wire connector?

Appreciate the help.