Blackmaws
The Edge
This Oil Pump Camp is near the southern edge of the map. Make your way through the camp until you come to a room with a grated floor - you'll see another room below. Hang a left off the nearby ramp to reach it, then check in the makeshift bathroom to find this by the tire toilet.
Bonecrack
This camp is on the southeastern edge of the convoy patrol route. Fight your way to the oil pump, then check inside the nearby shack to find the relic on a table.
Vantage Outpost
This outpost is near the southern border of the region. Look inside the helm to find the relic.
Scavenging Location #1
This location is in the middle of the convoy patrol route. Check inside the shipping container to find the relic.
Scavenging Location #2
This is on the northern edge of the region. Check inside the little caves for a lamppost - the relic is on the ground near it.