[gumby79]

Run your wiring inside conduit. Is how I've seen a lot of cattle trailers setup , to armor the wiring for brushy pastures.. my preference is for Tekonsha brake controllers based on info circa 2000. They have a confirmation of connection to the brakes and ground. It has a pendulum to ramp up the brake power based on g force. . Had my 7way plug get striped by a stick . Saw the led went out so know there was a problem before it was a surprise. 4'x8' +? tung are you planning an A frame or pole?
Glad you see fit for brakes most states require them at 1500lbs and the average shoper is unaware that they have to modify a 2000lbs Harbor Freight fold up to be leagal.
. Looking forward to pictures.

Helpfull hint
Always test the application strength for the current load before taking off . I learned that the hard way . Me my wife my kid some one played with the knobs between tows. City 25 mph first brake application above 2.5mphI had to hit the brakes hard . Some jack head pulled out in front of me @21k lbs. I had the up to 6 axel controller on a 2 axel 8000lbs ea turned all the way up and off level. It tryed to lock the tires 1 axel did as told 1 axel crushed the spring hangers , twisted the U bolts and spun 3 revolutions winding up the slack in the wiring disconnecting the brakes. Made me glad for 4wheel disk brakes on my 79K-20 . Fortunately the other driver realized the way was suddenly cloudy and raining 5thwheels and stoped clear. I was able to lemp to the new spot and had to call in a warranty claim as the traler had about 2000mi all asphalt in the previous 6 months . The trailer was bought new so no abuse from previous.