I have a 98 base model with no power seat, but yeah there is a hook/pocket thing that fits onto the seat track towards the front of the plastic cover and the on the track on the side towards the front, and then screws toward to the side/back to secure it.
__________________
1998 4Runner 3RZ 2WD Auto #671
RIP 2003 4Runner V8 Limited
RIP 1990 Celica GT
https://imgur.com/a/z8yIGRf?grid