I don't know off hand how to rewire the T2 transformer, but if you search in this forum, there are a few who have attempted it and there are some photos. I have attached the BOSS 5 wiring diagram from my service manual. I don't think it has enough info to show you how to rewire it. There should be a legend plate on the top of the transformer which illustrates the various primary/secondary taps. Search for a build thread from Shefron who I believe modified the T2 transformer to make a power supply.