How to bump start the engine when the main 330Vdc battery is dead

What is your question?

Didn't use the car for >2 months, now the engine does not start. The 12V battery is new, charged and checked, all the lights in the car light up when ignition key is turned on. However, there is no sound of trying the starter to run. We suppose the hybrid battery is fully discharged. Therefore we need a way to charge it externally or by the conventional 12Vdc battery. Possible? Thank you

What makes this problem better or worse?

Computer diagnostic shows no errors

How long has your 2008 Mazda Tribute had this problem?

5 days