ARK : Survival Evolved ScorchedEarth DLC Installation Guide
Stop your Game Server
Press the new button and give the command line a name in the description box.
In the Map box type in ScorchedEarth_P
Make sure the box to the left is selected
Save the command line, and then on the right of the command line you will see a select button. Click this to activate the command line.
Restart your server.