I used to always put them inside to out (pins on outside I think you are saying), but recently, can't tell you why, started putting them out to in, with the pin on the inside. Will be sure not only check pin per Neil's photo above, but also start putting pins on the outside.I watched a You Tube video by the RV Geeks about flat towing. They said to always put the pins from inside to outside. I started doing that and noticed the release pin was never tight so I guess it works.