Led ws2811 no power digi quad

Hello,
I just bought a new digi quad and meanwell power supply ws2811 led string , the led’s wont turn on.
I checked the voltage on the meanwell and it shows 12 volt, how to check the voltage on digiquad.
I have 10 led string set with 50 leds in each set.
Wled app is set
Any help is appreciated
Thanks

Looks like your lights are connected backwards. Data only flows one way. The beginning of the string is normally the male end (the end that plugs into the other end).

Also you will likely need power injection if you are trying to run 500 pixels chained together.