Help. Sea ray seville 3,0 mercruiser alternator wiring?

[Raido]

Hello Sea Ray guys.

Boat is Seville 1986y

Problem is(3 broken wires) and I dont know where I have to connect those. Big black wire and purple and green wich are little ones

Thank you!

 

[Bt Doctur]

The 4 wires are Orange, alt output, Black ground, red and any other color of the small wires are "sense" and "excite" sense is a constant 12v, excite is powered with the ign on

 

[Raido]

Ok, so I have to connect the big black to alternator ground and other litlle wires can stay like they are?