What happens next?

How to run up stirrups
Arrange the stirrup leathers so they hang straight down.
Allow the leather to lie flat against the saddle without twisting in either direction. The two sides of the leather should be on top of one another.
Your stirrup leathers will hang straight down with the stirrups dangling at the ends. Make sure that there are no knots or messes and that the leather straps are smoothly hanging on the stirrup bars.