I have a 2015 Prius C, my 12v battery had recently died (due to cold weather) and was attempting to put a new battery in. Due to my negligence, I switched the polarities. I didn't smell any smoke, but there was a spark and my car horn was going off. I disconnected the battery and to turn it off and switch to the correct setup. After this the car was unable to start and when it is on I receive the warning "check hybrid system pull over and turn off vehicle" no other power seems to go anywhere else in my car. (Just adding this information just in case it's needed) So after looking at my fuses several were blown along with the 100A DC/DC fusible link. My question is does anyone have a diagram or a video of how to access the bolts to change this, as I'm pretty much a novice when it comes to car repair and can't quite figure out how to remove the fuse box to access the bolt holding this in.
You can get an inexpensive subscription to the real factory repair manual here. It's your best bet. Good luck!
