We had a CRV, close to the to that year. We had a Blue OX Patriot braking system.
I ran the wires through the firewall close to the stirring column. There's already a cut out there, it just plugged with a plastic/rubber stopper.
I did this a few years ago, I don't remember all the ins and outs, we have a Jeep now. Make sure you read EVERYTHING about towing a CRV 4 wheels down. Is it all wheel drive? Is a manual transmission?
There are loads of people that will tell you they've towed a 2007/Honda for Miles and miles with no problems. Well I'm one that won't tell you that. We were on a long trip, around 6500 miles. About 600 miles from the end, transmission failed. We followed the steps RELIGIOUSLY afraid something would happen. I researched here, other sites talked to Honda, our mechanic, etc. Like I said, we have a Jeep now. Sad thing, I had to repurchase all the Blue ox base plate again, but wiring in the Jeep was a snap.
There are some steps to follow when towing 4 down.
Try this forum as well:
Honda CR-V Owners Club Forums
https://forums.edmunds.com/discussion/8578/honda/cr-v/honda-cr-v-dinghy-towing-behind-an-rv
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2015 Georgetown Forest River 351DS Class A
2008 Keystone Cougar 293SAB 5th Wheel
2007 Jay Flight 30.5RLS 5th Wheel
2006 Jay Flight 29BHS TT