I finally received my Milwaukee M18 12 Amp Hour batteries and my new Auger Drill. I have now seen the batteries for under $130 each,
The battery with connector fits perfectly (upside down) in the slot and is held with the velcro straps provided.
This leaves enough room to store the Ice Transducer in the back in case I did want to use it.
Just posted this on Craigs List for sale. Hard to imagine actually making money from ice fishing equipment. All my cash are "outflows" when it comes to this topic.