The injectors are fed from the fuel rail, which is a square tube between the inlet manifold and the drivers side cam cover (parallel to them)

It's fed from a tube which comes up by a small indented cut out in the drivers side inner wing (metal at that point). From there on it is rubber fuel hose covered in ribbed plastic which bends up through the inlet manifold to the fuel rail.

The outlet from the fuel rail is at the pressure regulator (the top hat thing at the back end of the fuel rail). The tube from this goes down and twists around to sit next to the inlet tube. These two tubes are the things you cut your arm on when you try and remove the oil filter (and indeed are the main obstructions to the oil filter)

On my car. Yours may be a little different. But there are four injectors anyway, fed from one fuel rail, with fuel hoses at either end and a pressure regulator at the back end. (7/00)