Hi Nightrunner,
Assuming your Imp is negative earth then the wire leading from the negative side of the coil (should be marked '-' and is almost certainly the single wire) goes to the points. The wire that fits to the positive side (marked '+') is the live feed. The car will run with the wires the wrong way round but it burns the points out quickly and the car won't be happy. Check the negative wire goes to the points and you are about there as the engine is very simple.
Good luck.



