the back half doesnt include a mount or a seating area.
we do have these available:
you drill 4 holes in the bed and bolt the bench to that.
you could bolt studs to the bed and run a quick disconnect pin through the studs, but i wouldnt trust my kids life in a system like that..
we can get the window netting for the rear as well. the nets usually range about $50 a side and the install kits are about a $100.