the 62 will not fit a 60 mount.
it still uses the post on the back . I think you will only have to change hole size and or location.
I think I am going to try the 78. only reason is that the power cord is the old 4 pin and the 62 powers with the microusb which I dont have a good feeling about using off road
Ride the DEZ
05 FE 550 Husaberg plated
09 KTM 690