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).