Change light setting

[craig7l]

The change lights on the my clubsport radical dash never seem to have been in synch with the upper change limit (probabaly because i trimmed 500revs off the top via the adjustable rev limiter)

I am now trying to reset them

I have a "box" (with wires going into the back of the dash)
with a button indicated "+" which is next to a little light marked "LED1" and another button"-" which is next to a little light marked "LED2"

Anybody know the procedure for setting this up?
thanks