Yamaha dual 704 control installation ?

[Cdnpokerface]

I'm having an issue hopefully someone can help...

I'm installing a used set of twin 150 hpdi's that came with control's etc

On the wiring harness coming from the 704 binnacle controls there is a small round plug with 4 brown wires going into the connector....

Where does this blasted plug connect to? I'm completely lost and can't seem to find where this belongs.

Any help would be appreciated

[rodbolt17]

its from the neutral safety switch and should go to the ign switch assy.