That's going to be a very hard task.
Expect your gear lever system to the diesel throttle and gear shift is a Teleflex Morse - google that and see what you can find. I found the below who could maybe assist. Seems like Teleflex Morse have changed their name to Seastar Solutions.
chsmith.com.au/brands/teleflex.html?gclid=EAIaIQobChMIloCq8ZCs7AIVgnwrCh2c-Q8lEAMYAiAAEgJ4uPD_BwEHow low down is it from your wheel? How low down do you have to bend? Can you put a temporary extension onto the gear lever? Realise there are probably dis-engage buttons to activate to move the lever.
Extending the system to your binnacle could be possible but these Teleflex Morse systems are only designed for a certain length, and they have to be fully secured at appropriate locations along their length else they will buckle under the compression loading case and not achieve the gear shift or throttle change. They could do the same under the tension loading case if not secured as designed.