I'm going to assume you have what is referred to as a "matchbox" distributor with the little black box on the side. If so, there are two spade lugs arranged in a "T" and they are labelled on the side of the black box. One is marked "B" and the other is... um, something else, I can never remember. The one marked "B" goes to the "+" side of the coil, and the other goes to the "-" side of the coil.
Of course, you should probably wait for others to reply, just in case I have my head up my ass at the moment!