Not sure what's confusing but the radio has a red and black power cord. If the truck doesn't have the equivalent then look for a one or two piece plug. If you have a simple volt/ohm meter you can find it.
Look up in the cubby hole. You should see the red and black connectors. Red is positive, black is ground. If they are any other color, check out with a test light before hooking up. Antennas on 2015 are much better than previous years. Try them before spending any money on upgrades. Connectors may be in center of dash towards windshield, behind the front face.