Noob: Enabling VESC 6 MKIII switch and hibernate

As a Trampa ESK8 owner with two VESC 6 MKIII's, I'm interested in enabling the power-on switch and hibernate mode capability...can someone guide me to instructions/manual for setting this up?  I'm aware it would require a 5V switch (any recommendations of existing button switches?) and it looks like MAYBE you connect the switch to the CAN GND and COM Switch but it doesn't really say if that's where the button switch is connected or if you just bridge those to enable the option??  And then how are both the switch and hibernation modes enabled in the firmware?...is there a setting in the VESC app?? ...I've done some searching online and digging through the app but have not found anything on this.

Thanks for any guidance!!!!!!!!!!:) 

Adam