i bought this guitar last night (it's awesome)
looking from players perspective
lower horn
left switch - neck pup
middle - bridge pup
right - strangle or bass cut switch
(down is off, up is on)
upper horn
switch - master kill switch
left roller - neck pup, single coil/humbucker blend switch
right roller - bridge pup, single coil/humbucker blend switch
That's it!