When generating a visual shader using e-ISF, if the majority of the screen is black, how to make that area "alpha" (translucent) so that I can put another video/track behind it?w

[profet]

For example lets say I have this shader creation in a track:

But I want the black to become invisible, so that the track “behind” this track can show. How to do that? Do i need to edit shaders, or is there an ebosuite plugin that can change black to alpha. Please advise