Sears Silvertone 150 head schematic?

[rosssurf]

I have an old Sears Silvertone "Solid State 150" amp head and I need a schematic. There seems to be two power chords coming out of this thing. One of them is toward the center of and cut with only about an inch of wire sticking out. The other one, the one closest to the edge of the amp is intact and is also connected to the utility outlet. Anyone have a schematic or know what this separate, al beit cut, powrechord is for?

[MstrB]

The middle one is the speaker cord. These were originally hardwired to their 9-10" speaker cabinets. I had one that was still 6 feet long so I added a 1/4" plug.