NVUM5-SP power up

[xMahdix]

Hello everyone,
This is my first time building a CNC milling equipment and i'm using NVUM5-SP from novusun as the main controller.
My question is do i need to power up the board or just connecting it to the USB is enough? I'm thinking that it's necessary to power it up because the limit sensors using are 12V pins & ground to detect the contacts, however there isn't any input port on the board. I was thinking of connecting the 12/24V power supply to one of the inputs but i'm not sure if that's the right thing to do.
Has anyone used this board and if so, how did you power it up? the manual doesn't have anything inside except this one picture that shows power is supplied throw a socket which includes "12V, INP1, INP2". can I connect the power supply to one of these INP1/INP2 together with the 12V pin?
I have included the wiring picture from the manual. I appreciate all the help and thank you in advance