RC GS gondola dump mechanisms


Of course I ended up buying this RC GS gondola in the WP foobie version fifteen years or more ago. I'm going to build it anyways. Have searched repeatedly on the 'net how the dump mechanismis supposed to be glued and even the Rio Grande one here in the photo files isn't that clear. Does the small offset tab on the main square block looking thing get attached vertically to the car bottom? Or do they rest diagonally on the door itself? The instructions aren't that clear.

Thank you,

Tony Pawley