Need help converting Bartolini TCT 3 band into 2 BAND 4 knobs,,,

[BASSALWAYS64]

Hello Tb,,, Does anyone have a Schematics wiring diagram of the Bartolini 2 band bass & treble preamp 4 knobs? My TCT is a 3 band 4 knob layout and i want to convert into 2 band.
The Bartolini site shows the 2 band Preamp but i don't see the schematic diagram,,,
Can anyone help?
Many Thanks,,,,,

 

[iplay5strings]

You simply move the midrange cut adjustment inside the electronics cavity as a trim pot