They are not supposed to be like that… they are supposed to have a socket in both sides…
The are not supposed to be like that - but Arrma uses plain old button head screws - so according to Arrma specs, it is correct. The hilarious thing is that they use actual droop screws on the Infraction roof skid - welcome to Arrma!
I replace them with Tekno droop screws on all my rigs.