The single wre from the distributor comes from it to the coil negative - side.
There should be a single connector with two wires attached to it, and this is the voltage feed, needs to be on the coil positive + side.
Last wire isn't known, but may just be tach wire. If so, it goes on the coil negative - side. If the tach wire is connected to the positive side of the coil, you won't get fire from the coil. If it isn't an ignition related wire, and is connected to either coil terminal, will probably not allow fire.