To activate the song on this map you need to collect five different coloured records hidden around the map. This will need you to open up most of the map in the process. Also for the unlocked song to be in your lobby music you will need to have switched on the power too.
Related Guide How To Switch On Power
The locations of all the records are as follows.
1. Red Record Location
Hidden under wooden pallets covered by a blue tarp by the Snack Snack. You'll need to go prone to see it.
2. Yellow Record Location
Inside a trash can to the left of Bombstoppers at the Motel. You can collect just by standing next to it but to see it you'll need to jump.
3. Green Record Location
Underneath of the table in the open RV by Mule Munchies at the Campground Area. You'll need to go prone to see it.
4. Orange Record Location
Under the cash register nearest the Vodka in the corner of the Beachside Market.
5. Blue Record Location
Behind a sheet of metal next to a wooden pallet near the engine part for the Violent Ray Device, in the Power Station.
After collecting all of the five vinyls, the player will be rewarded with 500XP and the song will begin to play. The song will also be added to the "Lobby Music" section of the Barracks.
