So, I have a newly purchased 2005 320DA. When I delivered it to its new summer slip upon purchasing, I realized that I did not have a shore power adapter. The marina let me borrow a y adapter but I really need to get my own so my question is what do I need? I see a lot of numbers listed out there as far as 30/50 amps and 125/250volts go. I also see different amp male and female numbers The shore power is 50 amp and im assuming my 320 is 30 amp. So what exactly do I need? Thanks!!