Yeah its below the carpet in the trunk. There is a plate over it that you have to take off before you can get down to the pump. Look for wires leading to that area.
Also, take your chiltons and throw it directly in the dumpster. Those things are freaking worthless. If you can swing the cash, Id really suggest you look into getting an actual S13 Factory Service Manual. They go on ebay for about 50 bucks and are MUCH MUCH better.
EDIT: Heres the one, for a good price too:
http://cgi.ebay.com/ebaymotors...ZWDVW