I was wondering if anyone else has tried this before, and if so any suggestions? I'm also trying to put my current speedometer / odometer in the new set of clocks so that I keep my current mileage reading.
My current clocks:

New clocks:
They're the same size, layout etc, and have the same electronics / speedometer cable connections. However, the new clocks seem to have two plugs, I presume one for the normal electronics and one for the rev counter, whereas my current clocks only have the one plug. Any idea what to do about this?
Cheers for any advice.
[edit]The back of the new one:




