GetComponent in JS quick help

I have a player and if he collides into a wall, a menu pops up and he loses. I have my menu disabled already. I am currently learning c# and when I had to use js to use my menu asset I got confused.

That is the menu I am using. I need to have the Menu Manager script enabled.

All my cubes (walls) have the End Game script attached. I need to get the menu object component I think.

And here is the End Game script which I need help with. Much thanks if anyone can help me! ☻☺