This can also effect the other LED's such as on the case:
The first number is 1-5 for the block of five, and 6 for the external power indicator, and then 7 for the internal one. The supported numbers for the colours are 0-3 for the level of brightness. The external ones support full RGB, the internal one only RB.
So for example:
echo "7 0 1" > /proc/aw9120_operation - turns the blue internal one back on
echo "3 0 1 0" > /proc/aw9120_operation - turns the middle outside one to green
Hopefully someone will wire these up nicely with some code to make them do the right things like low power and caps lock, incoming call etc.