I've got a Workingman 15 combo. I'm looking to snip the connection between the amp and the speaker and wire the speaker to its own jack. That way, I can use the thing as 1x15 cab for my Hartke head, but I can also plug from the combo's external speaker jack to the new jack connected the speaker and have the combo working again as it used to. At least, that's the plan. Any suggestions where I can go to get circuit diagrams and whatnot? SWR doesn't seem to offer it.