wildu

Hi guys, I have a problem with my Lexus IS 220D 2007. I was far away from country for a long time and my Lexus was out of doors all this time. After my come back I tried to run engine and my battery died, so I charged it and tried once agian. Engine started, everything looked good, but all electronic stuff wasn't working. To be honest just the engine and day lights work. The rest of the lights, mirrors, windows, air-conditioning, radio blah blah blah... don't work. Do you know what happened with my car? Weather is rainy, so I think that could be a problem with wet parts or something. Second question (see attachment). What is it? This cable is not connected and I have no idea where should it be. Cheers, David