Not sure where this belongs but I'll ask it here; So I've got a Sunn model T head with a switch for 2, 4, 8, and 16 ohms on the back, and two speaker outputs. (see pic) The first cabinet I've got is a Marshall jcm900 and it has two back inputs, and a switch (see pic). The other cabinet is just some 8ohm marshall with one input jack, no switches or anything. How do I set it up so it's safe to run these two cabinets with my one head? Thanks!