Here's a funky Second Line groove from Zigaboo Modeliste, on the song Keep On Marching, from the Meters album Good Old Funky Music.
Play the open hihat strongly— it helps if you have some pretty light hihats, as Modeliste does. On the downbeat of beat 3, he plays the hihat both with his hand and with his foot, or sometimes just with his foot— the sound is a little different, and accents that note a little bit.
Here's what he plays in the first measure of the recording, which you can use as a fill. The tenuto mark on the & of beat 3 indicates a half-open hihat.