One thing that decided to add was a ground power plug for charging the battery, jump-starting the engine, and/or running the (all-electric) avionics on the ground (such as for testing). I bought the standard 3-prong style plug from Aircraft Spruce
with the hinged cover, and glassed it into the nose of the fuselage in front of the canard. This keeps the plug in easy reach, far away from the prop, and puts the ground personnel within sight of the cockpit.
Ground Power Plug