it's not hard to do, but you need to do it right. Each amp must have its own cab. The coliseum wants a 2 ohm load, but will tolerate a 4 ohm load putting out a little less power (320 watts at 2 ohms, around 225-250 into 4 ohms).
Use the di out on the back of the T (I assume it is an old one, if it's a "reissue" I don't know if it has a di out) with a shielded cable to the input of the slave. Use the impedance selector on the T to match the cabinet impedance.
This will be really loud--prepare yourself and your neighborhood.