Same with my 3510, (same tractor, smaller engine).
Looks like a headlight mounted at back right corner.
I actually tapped this circuit to power my two overhead lights mounted to my canopy. They are offroad lights mounted with longer bolts that hold the canopy together.
Bolts are adjusted to hold lights snug, but allow me to swivel and pivot, aiming them right where I want them.
If you have a FEL, the front lights are helpful, but not sufficient alone. Also lets me see ahead and to the side.
-JC