The Lentech transbrake actually works off the ground circuit (to activate the transbrake you are grounding out the circuit). Therefore to power the 2-step you'll need to wire in a Bosch relay so that when the transbrake is grounded, the contact closes and powers the two-step. Its not real complicated, but call Lentech back and have them fax you the wiring schematic. Its shown in my Owner's manual that came with my Lentech. I'm going to have to do the same with mine to activate the timing retard when I get around to installing it.
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Jeff Chambers
Trophy Stock #3
11.86 Seconds / 113.8 MPH
Chambers Racing Team