The "Wires Crossed" quest in Arc Raiders wants you to obtain three specific Arc parts, then go to three different maps and attach said parts to antennas. While the game tells you everything you need — which parts and where to go — it's still a tricky quest to complete, because those parts are by no means easy to find, and the prompts to interact with at each location are also somewhat hidden. Here's a full walkthrough for the "Wires Crossed" quest in Arc Raiders.
There are just three quest steps for "Wires Crossed" in Arc Raiders, and they can be completed in any order: First up, you need to attach a Snitch Scanner to the antenna at Pilgrim's Peak. This is the simplest of the three because Snitch Scanners are fairly plentiful: just shoot down a Snitch and loot it. Head to Blue Gate, and you'll find Pilgrim's Peak at the northernmost point on the map.
At the back, there's a zipline you can take to the very top. Look to your left when you get up there, and you'll see a prompt to attach the Snitch Scanner to an antenna. However, first you need to obtain a Surveyor Vault.
Surveyors are one of the rarer Arc machines in the game, and they're also one of the most interesting because they're not hostile until you shoot at them. They look like big metal spheres and can be found rolling around any map, trying to avoid raiders. If you see a blue beam of light shooting up into the sky, that's a Surveyor, doing its thing.
I recently found two on the beach on Riven Tides, and have previously found them near the Grandioso Apartments on Buried City and on the outskirts of the Spaceport map. Surveyors can tank a lot of damage, but parts of them will break off periodically, which you can loot. As soon as you get your hands on a Surveyor Vault, head to Spaceport.
To find the antenna on top of the Launch Towers, head to the very top of the central location using the zipline. When you get to the top, you need to interact with a small grey box on the western tower. Finally, you need to get your hands on a Sentinel Firing Core.
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