If you are talking abouit the 94 accord for sale. Then their should be a Back-up light switch on the top of the transmission housing. It will have a Yellow wiring coming into it from the No. 1 fuse (Under-Dash Fuse Box). It will also have a Green/Black wire going out that goes to the reverse lights.

All this is in the 5th gen service manual on page 23-210 and 211.