Load mission...
look out towards the north.. randomly right click in the fog...
..wait for your 'persona' to tell about all the things he cant possibly see..
..wait and scan the base of your mountain and/or anywhere to the north of you, right clicking a lot.. You will spot the targets and tell your squad about them long before you see them...
If you don't do this, eventually AI squads will come up the mountain, shooting long before they should see you regardless.