Wiring harness

[tsubaki]

Looking at a wiring harness on a 2000, 150 horse Johnson Ocean Pro.
Everything is self explanatory and plugs into appropriate devices and locations except these two eyelet sets.

Colors on these animals are purple, black, gray and then purple, black, white/tan.
I'm expecting these to be gauge wires or the like.
What do these go to and which terminals if used, currently I don't have a trim indicator gauge or anything other than the tach.
Looking at the diagrams, white/tan is a trim indicator gauge. And they appear to be insulated on the wire harness drawing as to be unused.


And here is the tach, I expect the two terminals to be just for instrument lighting. There is an appropriate 8 pin plug in the harness for it.

What do the purple, black, gray sets and the purple, black, white/tan sets go to and what terminal designations (if used)?