The pump will have two fuel nipples...on for fuel from the tank, and the other for fuel to the carburetor. There is also a nipple near the camshaft case and one on the intake manifold. They are connected with a piece of tubing. Please refer to the instruction book If you don't have one, you can download it from:

http://manuals.hobbico.com/osm/fs-120s-iii-manual.pdf