OK...Kind of embarrassed to ask this question but here goes anyway. Just received my new Hartke 3500A head and Avatar B212 cab. On the back of the head it has two speaker outputs and the back of the cab has two inputs. Do I need to run one speaker cable to each output/input? Or, can I just run one cable from one of the speaker outputs on the head into one of the cab inputs? Can't wait to crank it up! Any help would be greatly appreciated... Thanks!