YOu want professiona advice
I will be glad to offer you info what I do but unless you are an electrician or have any knowledge of wiring up, don't do it. You can use a variety of outside plug to include 30 amp/110 volt inlet, 20amp/110 inlet or a plain marinco fitting for a regular electrical chord. I have placed this on the 23.5 and 240 in such a way not to interfere with the main salon or cock pit. I even have placed the hookup in the cockpit locker and the shore power chord will exit at the handle area with the lid down.When wiring, you need to know the circuit you are attaching to at the dock is wired correctly; otherwise, it could lead to electrocution. I stongly suggest that you put in a panel with polarity. If the red light ever comes on, disconnect fast as the dock again is wired up wrong. I lost a friend years ago as a result of faulty wiring at a resort.You also need to add a GFI. I can find one at Lowes with a 20 amp service but you have to look for it as most are for 15 amp. Also, you need to use marine grade wiring as it is easier to work with and it is doubly insulated. Remmeber black is hot,white is neutral and of course green is ground. Also secure all wiring and make sure that there is a cover plate behind the wiring.Crazy Dave Condon