How to remove back seat?

I need to temporarily remove the back seat in my 94 LeSabre to pass the cables for an amplifier and subwoofer. How do I remove it? I can't find anything on it in the Chilton service manual.

To remove the seat cushion,push rearward and then up in one motion
on each side.
If you look unfer it you will see the retainers.
The backrest is usualy bolted at bottom,you will see the bolts after the
seat cushion is removed.

So the bottom part of the seat can be removed with the push 'n pull method, just like the backrest can be removed partially?