Glow plug controller card wire

[Breacher]

So question for everyone what does this wire from the glow plug controller card connected to in the engine compartment? Is it for the heater fuel pump?

 

[doghead]

It's unused in your vehicle, unless you have an M1010.

https://www.steelsoldiers.com/showthread.php?69534-What-is-this-wire

 

[Breacher]

Thank you. That is what I thought.