12 Channel remote - upgrade.....possibly???

I was never happy with the two 12 channel remotes that I have had. Both have not fully worked properly regarding their relay connections.

I'm not an electronics person, only knowing the basics, so am not able to 'fix' components.

I found and ordered what I thought would be a better working 12 channel controller.

Compared to the original board.

But the new board I'm having connect up issues. I'm not 'technical' with electronics, though I can follow instructions, if there WHERE comprehensible instructions supplied 😒.......more soon, hopefully.