i have a table like that in my basement. i'm just waiting to give it away to someone, couldn't just throw it out now that i have 2 other tables down there, the men look exactly the same. anyway the front of the men on my table is side a, it helps for side b to be angles so that catching passes is easier. i'm sure it would play pretty close to the same either way.
my advice woud be to use side a as the front. side note, make sure the bearings are smooth as possible. its ball bearings that dont slide well on mine, but maybe someone on here has advice on how to make that better.