1. BEFORE connecting the Bump Controller to your PowerLab chargers, first power up the PowerLabs and configure the appropriate Expansion Channel Mode addresses for each PowerLab. The address of the PowerLab must match the Bump Controller port you are connecting it to, otherwise it will not be able to communicate. For our BumpCharger cases, we recommend connecting port #1 to the Powerlab on the left, and port #2 to the Powerlab on the right, but layout/ordering is up to you - just make sure the PowerLab address matches the Bump port number.
Follow the instructions in the Bump Controller user manual to configure PowerLab address - under the section "Configuring PowerLabs for Bump control" :