Thank you for the reply Thomas.
I get it, both feet will work just fine, but still wanted to ask whether there is some convention.
Let's say that you have two pedals - one for clave and one for quarter notes. If it were drums, I would keep time/quarter notes with my left foot on the hi-hat and play more complex patterns/clave with my right foot on the bass drum. Thus my choosing of right foot for the clave and left foot for additional time keeping. I think Eliel Lazo plays in this setup but I was not able to identify which foot plays what.
But of course, to each his own

I may have to try it and pick the foot that feels more comfortable.
p.s. with two congas, my left foot will have more space on the ground