Yanmar 3GM30F - What are these wires for

[sailcapt340]

On my 2000 Hunter 340, with Yanmar 3GM30F Engine. I have two wires, with bayonet connectors attached, that are not connected to anything.
They never have been since I bought the boat new in 2000. They are simply hanging there.
They come out of the wiring harness from the starter motor.
What would they have been used for that I didn't get when I purchased the boat? There has to be some piece of equipment or gauge I don't have.
I figured someone with the same boat has them connected to something.
Thanks for any help

 

[stuartsw]

Do you have a fire suppression system with a sensor for the engine compartment? It is possible that those are the wires for the sensor.

 

[sailcapt340]

No....I don't have that. It has to be for some gauge or diagnosing equipment. Just don't know what. I'm hoping someone has something plugged in to it.

 

[MitchM]

yan mar has diagnostic plugs on a number of its engines so their shops can figure out what's going on .

 

[Sailgunner]

Have similar wires on my 2000 410.

 

[artboas]

Have similar wires on my 2000 410.

Basic engine diagnostic philosophy
Step 1
Does it work?
If "Yes"
Step 2
Don't mess with it

 

[sailcapt340]

Artboas,
By far that's probably the best "Diagnostic Meter" anyone can add to their tool box. They seem happy where they are.

 

[pateco]

My 2 GM also has two hanging wires. I have no idea what they are for.
The blue one in the picture below is one of them.

 

[Ryan and ileana Bradley]

I have the same engine and the same wires and connector! I looked into it it is for a sail drive, which I don't have so it just hangs there, so I tied it up so it doesn't flop around.