If worried about the 4 shields fastener bolts getting rusty, coat the threads with waterproof grease, or never seize before installing them back.
i ought to actually try that but i dunno...Very pretty, now give it 2 good coats of cosmoline before you install it.
i think the other #2 is covering the transmission and possible xFer caseWhats the purpose of 2 shields? All toyota 4wd trucks I've owned since 1978 never had more than one, excluding the fuel tank.