Multi Outputs for Plugin

ie Direct Out 1, 2, 3 and 4 to separate channels in DAW,

What is it what is coming out of Direct Out 1,2,3,4? Pathes in between effects, or do you look into patch points inbetween the chain (e.g. before filter, after filter, after effects, inbetween effects?

Currently there is just one output, so just asking to better understand the requirements.

Separate outputs for the 3 OSCs, sampler and filters. would prefer using my own filters and effects in many situations. Or maybe simpler, a vst insert point on each OSC and the sampler would be an easier more elegant way.