I'll show you how my curtis 1204 is wired on CrazyBike2, but...
...first I will give you a warning about this: I am not confident that the bike frame you've got that on is going to hold up to what that motor, controller, and battery combination will be capable of. Since it has no suspension, if you intend to go fast on it, regardless of any experience you already have riding fast , it may come apart underneath you, or it might bounce off a rock or a pothole and smear you across the road. If it were a much lower-riding bike like my CrazyBike2 is, I'd feel better about it, but....
Anyway, it's your neck, and I'm crazy enough to ride a bike built of junk, so I have no business counselling anyone else.
So here's how mine is wired, first with a pic of it on the bike:
--B+ is pack positive. Motor also has one side wired here. Keyswitch also has one side wired here.
--B- is pack negative. Mine has a breaker between the actual batteries and the controller. Yours will have the contactor (and maybe a breaker too, or a fuse, would be a good idea). Throttle pot also has it's "bottom" side wired here.
--M- is motor's other side, whichever one needs to be negative to turn it the right way.
--Mine doesn't have an A2, but it's only used for wound-field motors, and yours are permanent magnet. So nothing goes there.
--The three little tabs:
1--keyswitch, one side to here and one side to B+
2--"top" side wire from throttle pot.
3--center wire from throttle pot.
You'll have to use a meter to tell which wire is which on the throttle, unless you already have a diagram that tells you which color is which.
I'm a bad boy and don't use a precharge resistor.
I do recommend it, though. Just wire it across the contactor's main pins. Then you use the ignition key to "turn off" the controller and the contactor.
Wiring up the contactor, well, I don't use one so I don't have a diagram for that, either, but the PDF instructions linked above do.
I STRONGLY recommend you crimp on *and solder* lugs to the wires that go to the Curtis. Just clamping the stripped wire onto it's tabs isn't going to work very well for very long (I already did this, trust me--I got lucky). If one of those wires comes loose while power is flowing, it could arc and destroy the controller. Really. Yes, it's happened.
Another bit of advice--those batteries won't put out anywhere near what that controller and motor are rated for for very long, and they'll die quick from doing that often.
