Hi Ainsley - the wiring for the Aces is very straightforward. The Aces control box comes with spade connectors ready to plug into the loom. There is a +12V supply, earth and tacho feed terminated in spade connectors as part of the standard 420 loom. Mine were tie wrapped together just under the dash near the ingnition switch. Can't remember off the top of my head the exact colour coding but it was pretty obvious. As I mentioned in my blog, I wasnot too keen on drilling a really big hole in scuttle to pass the connector from the light box to the control box - so I opened the light box and unsoldered all the connections. This meant I only needed to drill a 5mm hole - but of course it also meant I had to resolder it all back together once the wire was threaded. The standard Aces kit comes with excessively long wires (if you plan to put the control box under the dash on the drivers side - which is a good idea so that you can reach the buttons while driving) so you can also trim them to length to make it a neater job.
Have to say they are great fun and work really well once you get used to seeing them in your peripheral vision.
Cheers, Alastair