I vote for the 2002, a 2-cylinder engine (the 2001 is one cylinder, the 2002 is two cylinder, and the 2003 is three cylinder). Here are a couple of photos:
What you describe for
fuel connections can be seen in these two photos; connections to each cylinder near the top of the engine in the first
photo (near the number 18), and connections lower down on the opposite side as shown in
photo 2 (item #1, pointed to by the lines).
This series of engines has an individual injection pump for each cylinder. The connection at the top near the valve cover is the injector, the connection on the back side mid-way down is the injection
pump (item #1 in the second photo).