Well, now I'm thoroughly confused. Your first pic of an orange wire with black wires--that's the starter or something else?
1. Orange wire on your solenoid. Where does it go? And is that the only orange wire?
1a. There's a red wire on that terminal. Where does it go? Is it the only red wire in the pic?
2. Middle terminals look OK.
3. Yellow wire on the solenoid. Where does it go?
4. Battery terminal wires. Where does positive go? Negative?
Do you have multiple of the same color wires? Your wiring is not original, so who knows what's going on here...