Your limit switch lights are likely locate as circled in this photo (as we’ve both newly built our machines). You can manually test each switch with a finger and see if the matching light lights up. Of course, you’ll need a helping hand or clever work with a mirror.
My guess is one of them won’t light up and the wiring needs trouble shot. If they do, then I’d check that they are not getting pressed by the machine for some reason. Perhaps take close-up views of the switch when the limit should be reached and post back?
On a side note, are these limit switch lights broken out? - They’d be handy in a control panel at the front of the machine, but I don’t know if my soldering skills are up to snuff…
Also, in testing my machines switches, I found that my z-axis switch seems broken and wobbles back-and-forth and not just moves in and out like the other two do - I will follow up with support.
Also - Hey! Mine didn’t have the cool Shapeoko text engraved on any of the rails! Now I’m jealous!