What model Alumacraft is it?
Most alumacrafts (side console, Competitor, Dominator, Trophy, etc...) all come with a built in bus under the dash. The bus is wired for both posative and negative leads.
Some of the buses are wired directly to Aux switch on the dash (in the case of my dads Dominator).
My Competitor is NOT wired this way. Bus is wired direct to the battery (personal choice as I hate to flip a switch and turn on or off all my gear).
This main bus is protected with a fuse. There is a posative and negative side. You run your electronics with your inline fuse to the main bus for power.
Apologize if this isn't your setup but you might want to have a look before you install this panel. It could save you a ton of trouble.
I have OCD "Obsessive Crappie Disorder"