Bobcat 743 leaking control valve

Good morning,
I have a Bobcat 743 which is leaking oil from somewhere on the control valve but for the life of me I can't see where it is leaking from.
Is there one area of the valve that leaks more frequently than other areas? Can the seals in the valve be replaced with the valve still in the machine or does the whole thing have to be removed?
If it has to be removed is there a seal kit to be had, and would I replace all the seals in the valve while it's out or let well enough alone and...

Bobcat 743 leaking control valve

Bobcat 743 leaking control valve