Different corrections in same image

Hi,
I hope to explain it well.
I want to correct two different parts of clip in Resolve with different looks... Each part of the image needs different nodes. So I'm guessing the best way is to create a parallel chain of nodes one that corrects one part of the image, one that correct the other part and then combine them at the end. But I need a mask to do it...

Can I create masks that works an all the nodes in a series without manually connecting mask inputs for all the nodes?

di your parallel nodes, join them with a layer node, the last node of the (b) chain put your mask. it should work.

Yeah! It works...

Thanks Walter