(ET) Power connector for 36 volt external battery

[CZ Unit <cz alembic crystel com>]

So after a winter of heavy snow-blowing I finally drove the tractor to 
the shed and disconnected the blower. Pretty big job it did.

I then checked out the rear battery pack, all good, and the NiCD pack in 
the external weight box. It's hooked to the tractor via a 30 amp AMP 
connector, nice thing. However the wires (4 gauge) going to the 
connector had literally incinerated at the end; that would explain the 
reduced range on the last snowfall.

Anyway I need something that can allow me to hook up an external battery 
pack. What kind of connector did GE use for the external pack, and what 
should I be using here? Note that I am running NiCDs, and they can 
source a thousand amps which is way more than the T105's can.

C