I have a photo of a "headlight guard" installed between those two
holes that a friend sent me. It's a simple arc of 1/4" round steel
with flattened/punched ends with bolt holes that line up with the
headlight holes. The thing looks factory made, but I have a hard time
believing that there is any necessity for a guard when the headlights
are so well recessed. In other words, I have no idea what those holes
are for.
-BK
--