Need technical diagrams on where to find battery housing for replacement.

If I remember correctly, the batteries are located in the bottom of the C Arm.  Take off the panel that covers the front wheels and you should see the bank of batteries.  I am talking about the wheels that are close together on the C Arm.  Not the ones that are far apart.

Hello Bill! Thank you for the speedy reply.

This unit has only a single front wheel under the C-Arm and does not appear to have anything beneath the framing whcih connects to the main compartment with a back panel (and far-spaced wheels).

Any other suggestions?  Really appreciated.