Tail Light Wiring

I'm laying out a new wiring system for my 69 Dart and am working on the tail lights. Old harness has been tossed and my tail light bezels are not accessible at the moment. Can someone tell me how many bulbs are in the tail lights of the 69 Dart. Looking at the wiring diagram I have, it looks like one bulb is used for tail, stop, & turn signal light. Then there is another bulb in the housing for back-up lights. Can someone confirm this for me? Thanks.