Worked for me. Connect midi out from the pedal you'll be using to control the tempo to midi in on the other pedal. On the tempo unit, go to system menu, MIDI->Click Out->On. On the other unit go to system menu->MIDI->Click In->On.
Note that this is one way. Once you've set this up, you can only tap in the tempo on one of the units, not both, but tapping one sets the tempo for both.
