Stereo wire colours, I think I've got it right

[Smokes]

Hi all, I've done a search and I think I'm right but just wanted confirmation regarding the wires for a car stereo. The wires have been chock blocked from the previous owner, red from the dash goes to red and yellow on stereo, brown is negative. I've read on other threads this is correct but for some reason I have two brown wires going to the negative on the stereo. I've tried to trace it back but without cutting the harness open I'm stuck and would rather not do this

I guess I should really stop wasting my time with this and just wire it direct to the leisure battery?

Hopefully this is correct and I can carry on trying to find out what pins go where on this stupid Eltax stereo!

Thanks

[Mickyfin]

There's a helpful section in the WIKI about the stereo wiring. I know, as I printed it out ready for me to fit our new stereo:)