2002 Tahoe 22-RK

I have purchased a 2002 Tahoe M 22 RK 5th wheel made by Thor. I need a manual for it. It is missing the radio and I need to find how the wiring goes for it. I have looked on the Thor site, but couldn't find anything about them on the Thor site. It seems Thor doesn't own Tahoe anymore. Can someone help me find info on mt 5th wheel. Thanks