Lowrider 3 x endstop does hit

I am trying to figure out what is going wrong but my x axis endstop doesn’t line up with the notch on the x belt tightener, am I missing something? the endstop is too low or the belt tightener needs to be made with longer trip notch? Or am I missing something

There is a screw hole in the trip arm of the belt tensioner. Sometimes you have to thread a M3 screw in there to extend it out a little and hit the endstop

thank you, I knew I was missing something, I see the hole now.