I would follow the above as a plan if you haven't already.
Martin C = soulsonic = a well known smart d00d in the DIY pedal community.
SHAD'S FIRST PEDAL PROJECT
Moderated By: mods
Really,I think the drawn wiring diagram is throwing you off. Really you just need to solder your input/outputs to where the jacks were and power. Polarity is going to be your only concern. Do you have a DMM? You can always determine tip from sleeve on the in/out jacks by checking continuity to ground.