Infinite FlexCell Installation And Setup Manual page 16

C. Slip the junction box into the prosthesis and connect each
battery to the junction box on the controller. The connectors
are designed to plug in only one way. Check the orientation if it
does not plug in easily.
D. Connect the output connector to the terminal device. Pay
close attention to the polarity of the connector depicted below.
Otto Bock Connector
16
Only use FlexCell batteries with the FlexCell charging
port and junction box
Motion Control Connector