Passing jit.window to output or using jit.window in a super- from subpatchers

Hi. I have a few self-contained, unrelated patchers that each draw to a jit.window. I would like to combine these in a main 'superpatcher'. I.e. to pass what's passed to each intra-subpatcher jit.window, into jit.window(s) in the superpatcher. Is that possible?
Or directly using jit.window(s) in the super- from subpatchers? Ideally I'd like it to be an output of subpatchers for modularity, so I don't have to open them and assign jit.window(s) in the superpatcher.

Are there data objects that can hold exactly what's drawn to jit.window?

Sorry for the manyfolded question. I'm really new to Max and really excited. ;)