stm32f407vg discovery stlinkv2 virtual com port for uart/usb

hi. i work with the stm32f407vgDiscovery kit. i used the stm32f103rbNucleo kit before which has an stlink with a cirtual com port which i used with uart. the current board stm32f407vgdiscovery lists a virtual com port on my computer and i can also connect to it but i dont know how to use it. The schematics do not route the stlinkv2 to the boards uart nor usb. Is this not ment to be used ? There is an alternative to use cn5 (usb connector on board, not stlink) but id really prefer it to use the one within the stlink to have one cable only.