Hi
AC power (2 pins) should work either way, because it's not polarized as DC is.
What powertype in to the KN should be readable at the back at the KN where the plug insert is placed.
DC often have a smaller round plug, where current voltage and plug polarity is marked at the insertion point.
_________________________
Cheers 🥂
GJ
_______________________________________________
"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)