for the 2000 T5C - just square holes when we bought it. Maybe someone has info about NAPA parts that will work? I admit I haven't called the company; have been hoping to find a generic that will do the job.
I found the stock lights pretty much useless, mounted right behind the front bucket. I put a generic foglight set on the lower side of the roll bar. Has worked out great. I only have the one bar at the back. Used a wing nut so they can be loosened just enough to swivel for front or back aim.