Can't locate spark plugs

Hey guys. I have a 2003 2.0L 4Cyl Tracker and I'm having some difficulty locating my spark plugs. On top of the engine are 4 rectangular covers do not look like traditional spark plug boots, and on the side are 4 more, but they have a bolted rail connected to them.

I'm thinking that the 4 on the side are the fuel injectors, since they are so hard to get to, but I wanted to be sure before I start unplugging things. Does anyone have a diagram or know which is which? Thanks.

Those four covers on top of your engine are the ignition coils, and your spark plugs are underneath, but you'll need an extension at least 8 inches. The plugs are down in there. Good luck.

Be careful with the boots, under the coil packs, that go down over the plugs. They are hard to get off, easy to damage, and $20 each to replace.