904 leaks on park cable fix

I have a 1965 Barracuda a/6 with the 904 that has two cable going from shifter to the transmission.

The park cable has fluid leaking from somewhere. I'm new to transmissions and wondering best diagnostic tips and possible fix solutions.

Any issue with removing the cable from the trans? How would I do that?

Could I upgrade the shifter to single cable and keep the transmission or would I need a new one?

Thanks for any advice.