My '57 Desoto Firesweep did not come with the optional back-up light switch in the transmission push-button shifter. I bought what I think is the correct switch, MOPAR p/n 1704 234, but I can't figure out how to mount it on the push-button body. The hole where the 2 pronged lever goes through is too small. I am presuming the lever has to be bent at a right angle so that the Reverse push-button will activate it. If anyone has a closeup picture of the push-button switch with the back-up light switch installed, I sure would appreciate seeing it. I attached a picture of my switch and push-button assembly.