LOL!
Seriously? They weren't so secure that Thanos didn't get his hands on them TWICE. The bombs were in Wakanda because of plot contrivance or T'challa was an idiot -- take your pick. And no, I seriously doubt Wakanda's resources were used, since T'challa wasn't king of Wakanda.
I wait in anticipation for Black Panther to pay for the same crimes he committed.