Grab a ladder if you want to put it on after you've set the main tent up

You can zip the annexe roof on as you open the camper, or just let the 3 inner frames all the way down.
Should have eyelets bolted through the 3 uprights up at the top of the tent. 3 poles with the hooks on one end (and flat on the other) to go through the eyelets, these should hang by themselves, with the hooks on the end designed to hold them on.
You should have 2 extendable poles with flat ends with holes through them, these are to go between the 3 awning uprights. These all together make the annexe frame, pop it up, pull the roof over and put upright pole spikes through the eyelets, tension your extendable poles and you're sweet.
If its breezy or windy, make sure you put a guy rope on each upright.