Wait, i think i get it now... sorry

One outlet goes to the original breather outlet on the (facing front of engine) left of the rocker, the one slightly underneath that outlet goes to the right of the rocker. One of the 'underneath' outlets goes to the sump and the 'fourth' outlet goes to the metering head.

Im a dunce, sorry. Thanks

What difference would be seen if it is vented rather than connected to the metering unit? Anything?