LUKE 4 HSS adjustments in the control cavity aside from the boost???

HI, i just purchased a LUKE4 fireball /maple neck Hum /single/single and opened the contrl cavity to find more detneted control adjustments more than just the boost adjustment………..can anyone give me details for what these are for and what to expect when adjusted or a diagram of what they do??? i got nothing with the guitar except how to open and close the battery compartment…..thanks !!!