It's name should be Marine_AttackLaunch.
The same thing happens to me sometines where it doesn't show up so you just have to search for it manually if thst's the case.
Wow! I have to admit that is really amazing! Some of the best terrain I've seen. Must have taken ages to make. :0
You can also use Starting Locations found in the "Points" section. Apply The starting location to Player 1 inside Player Properties. That should make your camera pan at that exact location.