[Middleman]

Do you want em fat or thin?

If you want them thin in the background a pair of even Oktava 012s placed L&R about 2 feet off the rims works. Any small condenser pair works. Good for a dense mix.

If you want more of the barrel than a single condenser? midway between the bottom and top, in the center of the congas (usually works best with wooden floors for the bounce). This works for a sparse mix where the congas are the primary rhythm instrument.