Battery Drain??

Over the past weekend I wanted to replace the Power Antenna because the one I have isn't working, and I don't believe that it is hooked up anyways after the factory radio was replaced and I seen another antenna was placed under the dash to receive reception. I though that was half-assed but whatever. I disconnected the old power antenna and removed it to install an aftermarket one and I realized that I would have to do some modifications to the new bracket so I decided to just buy a direct replacement so I put the old antenna back in and didn't reconnect the wires thinking it was no big deal, well I went to start my car up about 2 days later after not using the car and the battery was dead? I gave it a jump and let it run for about 10 mins. know that it probably wouldn't put a full charge back into the battery but hopefully to leave enough juice to start the car the next day where I could run it around town but the battery is dead again?? Any suggestion? Would the power antenna drain the battery if it's not plugged in? Like I said it may be connected behind the radio but not sure but the antenna itself didn't work at all, but if it's connected to the radio and the power cords to the antenna aren't connected would that cause a drain? I'm going to check the alternator, and the battery was new and installed at Tuffy when I had the car worked on last september so I don't think the battery is the issue. The car ran fine till just now ao any help would be great.

It shouldn't drain the battery. If I can take a wild guess, I'd say you may have shorted a live wire to ground while working in the dashboard. Check for wire that might have come loose, or chafing on wire insulators that might be touching metal.