Found this in the wiki about modifying the boot directory.
Modify the system while it’s running
By default, batocera.linux is like a firmware. It’s a file called
/boot/batocera. You cannot modify it directly, and for most use cases, you shouldn’t need to modify it. All the user data is stored in
/userdata/, which is writable.
That said, in case you need to modify the system, there are tips to do it.
For any modification in /boot:
mount -o remount,rw /boot
So, if I change the path and then run that mount command it should make the changes permanent?
I dont really want to just try it in case it borks the install and I have to start again