The pro has single outlets so you will need to take 2 plus to a single remember they are non grounded. I'd actually suggest building a Y connector rather than buying a tee. The tee connectors are hard plastic and will likely hang up on each other.

You have read this...
http://www.spyderrobotics.com/suppor...letankuse.html

Make sure that you are not exceeding the wattage per channel on the pro (unlikely) and that each enclosure has the same power and sizes and types otherwise you will end up with differences. Other than that you should be fine.
Alex