hmmm sounds complicated if you look at my youtube video these are the wires i'm tryin to reconnect.

http://youtube.com/watch?v=b2uKYK7Laqg

Woohooo
I dont want to undermine GeeP, and the method you choose is entirely up to you but given the location of the damage, space is going to be an issue, there might not be room to accomodate 4 crimp-connectors next to each other

Oh...  Well, that changes things!

I would be inclined to replace the wires entirely.  Even using solder terminals and shrink wrap you're going to have trouble with the size of the knot!

That section has a seal to keep water out of the ignition.You would need to make the connections water tight.Radio shack has 40 watt soldering irons for $7 and some thin rosin core solder for a couple $$$.Shrink wrap couple $.You don't have to use the whole tube of shrink wrap.Just enough to cover the connection and run out onto the wire insulation.

Looking at the vid I would say thats 30 mins tops for any decent auto-electrician to sort out........if you dont feel confident enough to tackle it, and if you have a local mobile guy in your area it might be a better option to sound out some quotes and perhaps go-pro.