I assume you're talking about wiring for the lights on the trailer, right? Four-way flat connector?
On my '97 Ranger, there is a connection in the tail-light wiring up under the rear bumper that you can unplug and plug in a "T" connector that'll run down to your trailer lights- no hacking of factory wiring needed. You might find the loom on the shelf at a parts store or even Wal-Mart (Hoppy makes 'em, look in the towing section), or you can certainly order them online.
If a '93 has amber turn signals like my '97 (I can't remember), it'll need a slightly fancier and pricier unit to convert the signals to just red bulbs like a trailer has, but it's no big deal.
*If you were looking at anything with trailer brakes, it'd be more complicated...but if it needs brakes, I wouldn't bother hitching it to a 4-cylinder Ranger.