650ss rocker spindle flat orientation

On old-britts (www.oldbritts.com/11_head_info.html) it says 'The flat on the rocker arm spindle for commandos must face out from the center of the head. For atlas type heads, with rocker oil feed at the top of the head instead of the side of the head, the flats face toward the center of the head.' On my 650ss (oil feed at top of head) I have high pressure oil to the head with commando rocker spindles. Which way should the spindle flat/hole face? Many thanks,