problems met skr pro en endstops (no replies)

hi i'm new in marlin en vs code
i've built a 3d printer met btt skr pro v1.2 met 2 z leadscrews , 2 extruders and and single endstops.but my endstops don't trigger, what am i doing wrong? in marlin or something else? i use marlin 2.1.3-b1
can someone help?