Beaglebone: Re-assigning a local USB keyboard to the serial console

Hello, I would like to re-assign a keyboard that is connected to the
BeagleBone locally via USB to the serial console (ttyO0) instead of
the default tty1. I have read quite a few articles online that
describe how to do this by editing INITTAB but it doesn't appear that
Angstrom uses INITTAB, possibly because they appear to use systemd
instead. Does anyone know the solution to this?

Thank you in advance.