So the CNC4YOU diagram assumes "open collector" outputs on the controller. The driver has opto isolators on each input, with an LED that illuminates a photodiode so there is complete "galvanic" isolation between the inputs and the internal circuitry. Each LED has a 270R current limiting resistor as well as potentially another series resistor R which may be needed with higher values of Vcc as shown in the table.

Your controller seems to have +5v logic outputs rather than open-collector judging by the spec of the routout stepper driver - do you have a spec for the controller itself? Assuming that I'm right, the BoB outputs should go to the + side of the driver inputs rather than that being connected to Vcc, and the - sides should be grounded to your BoB ground. You should not need a Vcc connection between the BoB and the driver since this is derived internally.

You may find that the logic levels are now inverted in which case you will need to fix them in config.