I want to replace the shore power inlet since the cord was ripped out of it a few seasons back when some 'helpful' person tied off all the slack in my cord and at dead low tide, the cord went tight and was pulled out of the socket. Some of the threads are damaged and its getting a little worn looking anyway. Currently it has one of the plastic Marinco sockets with snap down door. I'd like to install a stainless Marinco unit. I have Several questions, 1. is the screw pattern the same on these two inlet sockets? Don't want to have extra holes. 2. Is it held on with machine screws and nuts or wood screws? 3. How do you access the back of the socket? Looks like it would be located somewhere in the hanging locker on the port side on the 300DA. Any help appreciated.