Looks like the Center Console placement will work on a '15 Focus Electric when the key FOB battery is dead according to the "Security" section of the Owners Manual at http://www.fordservicecontent.com/Ford_Content/Catalog/owner_information/2015-Focus-Electric-Owners-Manual-version-1_om_EN-US_11_2014.pdf
But this is more complicated than that, and likely not a key FOB battery problem, read on:
At first I'd say just replace the key FOB batteries, but I doubt the FOB batteries are the problem since both are not starting your car. Usually only one CR2032 battery fails at a time.
It's as if the previous 12v battery failure caused the car's internal code it exchanges with key FOBs to be forgotten, as in memory loss or something in a rolling code algorithm is off now.
I read the 2015 owners manual "Security" section (page 64) and it looks like you have to have it towed to a dealership. They do not allow a key FOB to be programmed unless there are already 2 previously working key FOBs. This keeps thieves from easly using any random Ford key FOB on your particular car. Security measure. In fact, I would bring the dealership some proof you own the car. Sounds bizarre, but Security is a thing.
The only Hail Mary play I can think of is to disconnect the 12v battery and reconnect it. That might cause an initialization sequence to happen in the car's computer which might correctly retrieve the stored internal Security codes it exchanges with key FOBs normally. Might work (??).
If you have another Ford car in your fleet, make sure you have the right keys for your particular Focus Electric.
