Ok...so...I have been through the exact same thing already with my 2003 5.0 mpi.
Had a few beers so I'll try my best.
First and foremost. You need to buy a yellow terminator cap. No point even going any further until you get this. Later models have one fitted already but we don't. It's just a purple one we have...from memory.
Once you have this;
Best take air filter cover off for best viewing.
If you are facing aft and over the engine, look to the right of the air intake and below...above the rocket cover and between the air inlet throttle body and the exhaust manifold will be a terminal with a purple end on it.
Once found...remove purple terminal cap and plug in one outlet of the VVM module..it will be obvious which one when you see it.
Then you will have one loose end. This is where you put the yellow "terminator cap". Then simply install the VVM module somewhere away out the way of the exhausts and heat...as best you can. Done worry too much about where in the engine bay...mine connect with the phone at least 30ft away from the boat.
Hope this makes sense. If it doesn't, there is a much better explanation on one of the maxum or searay websites. I'll find it for you if need be.
Overall, it's a superb piece of kit. So handy for fuel consumption and true rpms to get the prop spot on. Also a really cool gadget.
