We have trouble with white footed or deer mice, but they don't seem to chew wires, I've had a few incidences where a small wire was chewed in a truck that sat a long time and where they disturbed a telephone line in my house, took the insulation off and pee'd on the line, was an odd situation.
Peppermint extract, oil or some sort of mixture of that, would help, they hate that smell. Dryer sheets seem to work. I have 2 trucks in my yard to finish and one I could not keep the mice out of, until I took the dash down to the firewall, cleaned everything and eliminated the pee odor. I found a bonus nest in the cab corner, keep dryer sheets in there and even when they get stale, mice will absolutely not go in there.
The key is to eliminate that odor once they have gotten into something. I find that eliminating any habitat near ones place helps quite a bit.
If you have a population established, a bucket trap with 1/3 full of water will work, just like the one in the photo, just use water and make it deep enough they have to swim, can't touch bottom.
The live catch traps, metal ones, load those with Kashi pumpkin spice and flax granola bars, mice seem to love that stuff and it has a strong scent, that will draw them in, I like a multi catch trap, in case I am not around or can't check for a day, you can't leave them too long or they die and it reeks. Multi catch traps keep working, the plastic Victor live traps at TSC are ok, but the plastic tabs that keep them in, mice can chew those down and escape, you have to glue thin sheet metal to them, then they work fine.
That is a huge nest, I had one get into the fresh air intake on my car late last spring, just started getting hot, really bad, dead odor out of my vents, I had to remove the cover on the exterior, the deer or white foot mouse, apparently died of old age in the nest, I removed same, cleaned thoroughly, changed the cabin air filter, checked for any other signs, thankfully he stayed where he did, no further dis-assembly needed, I installed a small piece of hardware cloth where he got in, can't do that anymore, still hard to figure out where he got in that area, most times they go for the air breather.