Kill Creek: A ledge right on the drop right below the bravo respawn.
Overdose: Under the stairs facing the alpha respawn.
Shortfuse: (Glitch,) on top of the semi truck facing the alpha respawn.
Sand Hog: Behind the trash bin facing the bravo respawn. (or the other way around)
Waverider: Behind the tower facing bravo or alpha respawns.
-all i could think of atm.