I have. It's low-budget, and the terminals can lose contact over time, which kills some or all of your taillights, but it's cheap & easy.
It's better to just solder in your own new wires & make them as long/short as you want. Primary wire & split loom aren't very expensive, & good to have around anyway, so pick up some good stuff from a parts/hardware store.
Where can I find a wiring diagram for the bronco? I cannot find my Haynes.
I am in dire need to have my trailer lights working - I had no idea they did not work until today. Turns out some moron who did some work on my Bronco a few years ago cut my plug wires so it has not been working since.
The proper tee adapter for the Bronco is the Hoppy model 40425. I bought the 40125 which is for the F150 but it is wired differently than the 40425. I will return the one I bought and just hard wire the 47185 4 to 7 adapter to the Beater.