Cranetruck, sorry for the delay responding. I have managed some fiddling with the XM791's but the weather and then a raging cold have had me offline for a bit.
The rock guard panel mounting holes are behind the forward headlamps on 0001 and about a foot from the outer edge. I would say, midway between the the back of the headlamp box and the cab tub.
What I did today was to determine the slinger arrangements for both trucks. What we have is 2 fairly complete sling attachments and parts of a third. Enough to equip one truck for sure. Were the sling attachments left in place? (or stowed?)
I am attaching some cellphone photos of the crew names on the windshields. Of the 4 positions, the driver side on one truck is too worn away to tell much other than at one time there was a name stenciled there. I would note that the Windshield on 0001 does not have camo paint so it might be a replacement window off some other truck. The names that I can read seem to be SGT Katvala, SGT or SSGT Harris, and Malone or Maloni or Malont.