Do you mean the timing tuner? If so you just need to plug it into the crank sensor which is above and very close to the back end of the starter. You will need to get the starting motor out of the way to reach it. You will need to drop the exhaust manifold to get to the starter. The 2 nitrous wires need a 12v source and a ground. I don't know about the timing twister. If you have the timing tuner are you going to also utilize its window switch function?
Here is a link to a pic of the crank sensor plug on a C5 http://forums.corvetteforum.com/c5-t...o-starter.html
go to post #8 and open that link for the picture