ASM1 power supply

[alone]

Hi!

I have completed the asm1 + ricks ladder fitler all in one metal box
tested and it works in normal known fluctuations (pitch tend to drift once 
in a while)

right now trying to figure the power supply structure
i have two 7815 units and the diode bridge (the four leg small round black 
unit)
and a transfomer that gives ac +15 +15 and 0

im puzzled abit how to assemble it all.
the diodebridge orientation is not understood too.
any help,  suggests  schematics will be great for me
tnx!