It's the same portal, but Pluto unfortunately doesn't have any records from that far back. That all happened before the Helix station was built. She'd advise Soldat to ask Dr. Solis about that kind of stuff.

The radio endeavor sounds worthwhile to her, but she's doubtful that it'll have the range to connect the town and the station. Getting the station hooked up to the network is the best bet, and that will require either a manual connection similar to what the lighthouse has OR some serious signal boosting... It'll be tricky, either way.

But, Pluto is real interested in those deets about the green-eyed spirits! If Soldat is willing to explain what he's looking to find through the portal logs, Pluto will tell him what she knows/give him some potential leads to follow in exchange for his green-eyed spirit story. If she's not able to help with the portal stuff, she'll throw in a set of GPS coordinates for his trouble. Somewhere real nice, she promises.

Or, like, Soldat could just take the GPS coordinates or pick another thing he's interested in, that's fine too.