It does and you can see the 2 gray and one black ribbon cable to the right.
There is a terminal button on the LCD screen menu that lets you enter commands directly.
If you type M119 into it you should see a response like in this post Lowrider3 CNC Won't Move in Y Axis, Gives Error "Printer halted. kill() called!" - #3 by Greg_Smith
Press and hold each endstop and run m119 again and each should change to ‘triggered’ if they are working.