Please note I'm by no means an expert in this but having read nearly every thread on this site about it I hope some of the info I have found will help you as it has helped me.
You may have already read through the frequent questions page and seen the helpful diagram showing the wiring. Attached are a couple of photos showing the result. The module appears to come as either a 2 pin or 3 pin version but even the 3 pin only has two wires running from it. White to positive side of the coil and white/black to negative. You need the switched 12v feed to the positive side of the coil as explained in that guide. In my photos the rev counter wire ( also white/black is seen connected to the negative also).
My main problem was that all of a sudden I had no spark. I think the wiring was incorrectly fitted by the previous owner and was a surprise it ever ran but eventually it must have blown the module. Trying to track down a 3 pin version, I started off by checking the well known Mini suppliers but they appeared to only show 2 pin versions and thery wanted a hefty £35 each for them (why?). My local motor factors could supply either a 2 or 3 pin version for a slighly better £25 but check these links or google the part numbers 15410 or 15420
http://partfinder.sm...amp;value=15410
and you will find online suppliers selling for around £12 plus vat !!
even better I checked the cross reference vehicles list and saw that Rover 100's use them. My local breakers yard seems to have a load of these and the non injection models have the very same module bolted to the dizzy ( 3 for £20 not bad)
Anyway I'm up and running again with a couple of spares. I hope this is of help.