Jeep 2004 Wrangler - Manual (Page 34)

The front passenger and rear seat lower anchorages are
round bars, located at the rear of the seat cushion where
it meets the seat back, and are just visible when you lean
into the rear seat to install the child restraint. You will
easily feel them if you run your finger along the inter-
section of the seatback and seat cushion surfaces.
Front Seat Latch Anchors
Rear Seat Latch Anchors
34 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE