Anyone know what goes in this spot?

As I was lamenting my lack of space for a second battery (2019 Sport access manual, still clean since only have 1200 miles on it) I noticed something weird. This is while standing at the passenger side wheel well. Looks like some kind of cylindrical canister could fit in that coiled wire to hold it. Plus there is a rubber hose just sticking out of the firewall unterminated. Kind of hard to see in the pics. Wondering why the hose is not connected to anything and what that canister-looking thing is and if there was something that gets held in the coils of wire and what the thing is in the last photo taking up the spot for my 2nd battery with the four tubes coming out the top:

 

The tube is probably the AC drain, and the other thing looks like your ABS module. Coil tubing is probably brake related as well.

 

the hose could be your A/C drip tube

 

The rubber hose is the A/C evaporator core drain.
The four tubes are part of your ABS/Brake system.
Don't mess with the coilee-do thingie, it's made that way (perhaps stress/vibration resistance...).

 

That hose is the A/C condenser tube, it's meant to drain out to the ground, theres a mod to extend the tube.

 

Dang I sure like getting good answers to my noob questions on this forum!

 

Coiled up brake lines are also in some cases for cooling. Brake fluid gets hot, and can boil. Mostly after many miles. Change out your brake fluid when PPM copper is higher that 200. Test strips at parts stores.
Zim

 

Those are your brake lines coiled up

 

Brake lines are coiled up to match length with opposing side, this balances force.