Question about laying b-roll over a multi cam clip with a dissolve transiftion in it.

I'm currently editing a music video and I would like to lay b-roll over a multicam clip. The problem I'm having is that I want to use dissolve transitions in between 2 b-roll clips but it reveals the video on my multi-cam main timeline. I tried to disable only the video of my multicam clip but couldnt figure out how to do that. I know there is a simple solution to this. please help me out.

Select a Range below the transition, use the replace with slug command, or overwrite to Storyline command.

Thanks!