In the quest “Our Presence Up There” in ARC Raiders, you will be helping Celeste and Shani in getting an First Wave outpost back online near The Dam. The objective is to restore power and install communication so that the scouts can use the area once again. It’s a quick mission that takes you through the Pattern House, where you’ll need to power up the building and finish the antenna setup on the roof to complete the task.
Our Presence Up There Quest Guide

You’ll get the “Our Presence Up There” quest from Shani at The Dam. With ARC forces moving closer, Celeste wants to fix up an old First Wave outpost near The Dam so their scouts can start using it again. They’ve already checked out the place themselves, but they’ll need a few extra hands to help get everything back in working order.
In this mission, you’ll need to make your way to the Pattern House located in The Dam area. Once you’re there, look around for a power switch inside the building interact with it to get things running. After that, climb up to the roof to finish setting up the antenna installation. When you complete the quest, you’ll be rewarded with a Silencer I Recipe and 14,000 XP.
Visit the Pattern House in The Dam

For this quest, start by heading to the Pattern House, which is a residential building located on the northern side of The Dam map. Once you arrive, go inside through the ground-floor entrance.

As you step in, look for a small room near the staircase, that’s where you’ll find the power switch. Interact with it to activate it, then use the nearby zipline to make your way up to the roof.

Once you reach the rooftop, head toward the yellow console and interact with it to activate the antenna terminal. That’ll complete the quest.
