Where do each of these wires go?

ok. Well, what's done is done but it would have been better if you could have waited until you had everything together so you could test at each stage and also to know the lengths of wires and routing them as you go holding them together in bundles with either small loops of tape etc. Granted, that mostly applies to only the engine since that's what's missing. I'm sure you had your reasons for going ahead with it. My best advice is to not wrap everything up in electrical tape until you are certain everything works and you have it routed like you want it. Even then I would use the non adhesive tape in case you need to change something or something doesn't work etc..