What I learned recently ... is on one of my trailers are screws and they looked to be torx etc... I saw it listed on their website "2 square screw "..
So I asked .... what bit do you use .... ready .... a #2 square bit .... Really...
January 28th&29th in Springfield Mass. All scale train show !
Largest train show in the area..
Lots to see and Buy ..
https://www.railroadhobbyshow.com/about-the-show.php