[N64] Can a composite cable still be used with RGB mod installed?

I was wanting to install a RGB amp in my N64 but wouldn't be able to get the remaining needed components for the scart and upscaler. I was wondering if having the RGB amp installed causes any issues with the regular video or s-video cables.

 

Nope, it should be just fine. You would have to consciously cut the composite/svideo traces to make the "regular" cables not work.