Domer, I just had to remove my rear seats to install new rear speakers. All you've got, as I recall, is those low lap belt mounting bolts to the frame. 3-4 of them. Just pop the lower cushion out by releasing the springs underneath and you can see it all well. The bolts are long enough to add at least one more seat belt mounting plate (whatever you call it). I'm not a dad though, so I don't know how carseats work.