The DC to DC converter is located at top right center of ICE compartment. Also the orange tubing is right next to it, pics are from MADMAX in the process of being repaired after hitting deer at the end of 2013. Needless to say CMAX turned into MADMAX.Paul
That's the inverter on top of ICE that converts HVB DC to 3 phase AC voltage when motors are using power and 3 phase AC to HVB DC when the electric motors are producing power. The DC/DC converter is in the rear near the HVB. It converts HVB DC to 12V DC.