Desperately Seeking Schematic For Strat~~
This drawing is a master tone, so the tone affects both pickups. The way to make it tone only on the bridge is instead of tapping the tone off the volume, tap the tone off the bridge pickup before he switch. Note that when both pickups are selected the bridge tone will affect the neck also.
Are you planning on splitting the bridge? If not, just solder the red+white together and cover them. Treat the black and green/bare as positive and ground from the drawing.