Look under the floor pan, possible studs go thru the floor.

All seat assemblies are secured to the floor pan by either nuts
installed on the floor pan anchor plate studs, or bolts installed into
the anchor nuts or plates in the floor pan.
All electrically operated seats and seats equipped with a cigar
lighter, courtesy lamps etc., have a ground wire secured to the seat
frame and under one of the seat adjuster to floor pan attaching bolts
or nuts.
 
- On models so equipped, remove the shoulder belt guide loop inner
 attaching screw; then carefully lift the upper portion of the guide
 loop enough to slide the shoulder strap webbing out of the loop.
- Operate the seat to the full forward position. If the six way power
 seat is operable, operate the seat to the full forward and upward
 position. Where necessary to gain access to the adjuster to floor pan
 attaching bolts or nuts, remove the adjuster foot covers.
- On full width and split seats where the front inner seat belts go
 through the seat assembly, remove the inner seat belt to floor pan
 anchor plate attaching bolts.
- Remove the adjuster rear foot covers and track covers, where
 present; then remove the adjuster to floor pan rear attaching nuts or
 bolts. Operate the seat to the full rearward position. Remove the
 adjuster foot covers and track covers where present; then remove the
 adjuster to floor pan front attaching nuts or bolts.
- On seats having any electrical equipment such as power adjusters,
 power reclining seat back, cigar lighter, etc., tilt the seat
 rearward and disconnect the feed wire connector.
- With the aid of a helper, remove the seat assembly from the car.
 To install:
 
- Check that both adjusters are parallel and in phase with each
 other. If not operate the power adjusters to the full forward
 position then disconnect the cable from the adjuster that has reached
 its full forward position. Operate the other adjuster until it reaches
 its full forward position then reconnect the cable. Check the
 operation of both adjusters.
- Tighten the seat adjuster to floor pan attaching bolts or nuts to
 18-24 ft. lbs. (24-33 Nm
 Sorry, no pic.'s, but this may help.

Maybe look just off to the side of the track in the carpet at the rear
for a bolt head.  The fronts are nuts on studs I think and the rear
looks different which can throw you off.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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