Anderson Power Poles
The connectors are soldered to a circuit board that in in the bottom of the box. There is 1 fuse for the 4 outlets.
This lives on my work bench and is fed with a 60 amp power supply. The fuse holders where purchased at the local Auto Zone automotive store. I used a dremel to remove the material on the one with the power poles. The Fuse holders have dovetails on them and fit together rather nicely.
Radio shack cleared these out a while back for like $20.00 I added the binding posts and the power pole.
The power pole is wired to use the breaker in the back of the unit.
This thing gets so much use I do not know how I got along with out it. I purchased a 2nd one to leave in our camper.
More power pole information from around the web
Power Pole Manufacture links
West Mountain Radio
Quick Silver Radio Products
Saratoga Amateur Products