A sensorless, brushless, controller will work with just the three fat wires hooked up. A sensored controller will need all the wires connected, in the proper sequence.
You can get a decent sensorless controller here, assuming you are in the USA. http://www.hightekbikes.com/controller.html
To further simplify things, get a throttle from the same place, and you can just plug and play. You will have to provide your own three connectors for the fat wires, since it's unlikely that the motor and controller connectors will match.
Andersons, from here, is a typical choice for the three fat wires. http://www.powerwerx.com/anderson-powerpoles/housings-contacts/1327-1327G6-pp15-30-45-colored-housing.html
You want two each, of green, blue and yellow housings. and get 25 or so 30 amp contacts. Get some red and blue housings too, since you will want them to connect the battery to the controller.