Can't boot into console or WebGUI, edit /boot/loader.conf.local?

[BBCModelB]

Hi, it appears my Atom based PFSENSE box cannot boot into WebGUI or Console

I've a similar problem to this thread
https://forum.netgate.com/topic/135874/console-fails-to-boot-after-2-4-4-upgrade

I'm aware I need to edit /boot/loader.conf.local and add the line
kern.vty=sc

My problem is, I don't have WebGUI or Console, so I'm connected directly to the box, where I have the initial Welcome To PFSENSE screen, with a menu that lets me Escape to loader prompt, Configure Boot Options, etc...

Can some kind soul advise how I can edit the loader.conf.local from here, or some other method? The pfsense box is just a home build, and connected to my LAN

[BBCModelB]

OK, here's I fixed it.

From loader prompt, I used the command(s)

set kern.vty=sc
boot

note, using the set command is a temporary solution, read on...
this got me to the pfsense console

from there I accessed the shell and used the built in editor, vi, to edit the file located at /boot/loader.conf.local and added the line

set kern.vty=sc

which ensures this command is executed at each boot
saved my changes, rebooted