Composite jack bypass on NESRGB modded NES?

I installed one of Tim Worthington's NESRGB mod kits on my NES last year and it's an absolutely brilliant mod. Loved it so much that I went and got the Atari 2600 version and installed it on my Vader last week. One thing I left kind of unfinished on my NES that is still nagging me though is that I still haven't wired it up so that the new composite video runs to the original AV port on the side of the NES. It's a completionist / OCD kinda thing but I don't like that the composite jack is basically useless right now, and I'd like to give the system the option of connecting through the side jacks if I or anyone else using the system ever needs to for any reason.

I found this picture on google that is related to a different RGB mod in order tap into the composite signal for sync, but it gace me the following idea: could I basically just tap into the solder joints on the bottom of the RF box that connect to the AV jack, run wires back to the NESRGB board, and then cut the original traces? On paper that's all I should need to do to get the new composite and audio signals to run to the old jacks, right?



I just wanted to get some opinions on it before I go and crack the NES back open and make a change that could potentially be difficult to reverse if it doesn't work correctly. I'm quite certain it will work fine but with every project I do it seems that there's always a fly in the ointment.

 

In theory, it should work fine, but im no expert.