I hope you didn't hardwire the entire brake controller from front to rear. The wire for "brake" is under the dash. It's labeled. The other signal wire is just a splice into the brake connector above the pedal switch. It's fairly straightforward.
Yes, these rigs will tow like champs. The engine, transmission, suspension, etc. are all heavier duty than the gas models. Only the wheelbase holds them back. And the wheelbase isn't all that awful, it's just not that great either. Time your time and keep your speed down and you can tow whatever you want with it.
