Looked again -
Looks like someone swiped the rear ladder bracket, and the front one is hanging upside down. Any chance the missing one is sitting in the hose bed?
By-the-way, the "hole" bracket on the rear of the driver's side is for a pike pole - the rear of the pole slid through there, and the hook rested in the other bracket towards the front. Those brackets are Central-specific.
Nice, beefy bumper!
-Michael