I recently purchased a Catalina hottub with balboa instrument panel, System Cat 200. The problem is wiring was disconnect from where the power goes into the system. If I could see a picture or an explanation of which wire goes to which terminal that would be great.

Should be a diagram inside the cover.
I was able to find your board, but not enough detail to show connections.
Can you provide a close up photo or list the words on the bottom terminals, also I forget what the Tabs on the right side of the panel go too.
I spoke with Balboa Instruments, they don't have info for the Catalina 200? Strange?
And I haven't found Catalinas site for manuals?
Photos will work.