hmmm… tough teaser… lemme guess, hanging mechanism?
Using a lightning bolt for power may violate a rule… Or did you mean “lightening?”:yikes:
Maybe they’re lightning lightening holes?
(Look at the turret)
Team 604’s 2009 robot:
http://lh3.ggpht.com/_-AQ1h_gLd2w/SZpjZAd0XBI/AAAAAAAALx8/0hctKrZ_AoE/_DSC3387.jpg