My inverter (for garage power) has two crocodile clips. It was very easy to
'install'.

Mine was a aboard the boat, still in it's box and will be switched into the
boat's shore power system. It has a flush cutout and a dedicated double socket,
but they will be hidden. A flip of the switch will have the inverter replace
the shore power, but only enough to run a small TV or charge the laptop.

RB