Which side of the road in Pu'an east I need to take the bus to Zhujiajiao

It should be the west side of the road, near the bus stop, there are traffic lights and a crossing. If you are still confused, ask a local to show you the "Pu’an Road East Yan’an Road" bus stop.

You cannot use the pass to take the bus, for the pass is only valid for the subway ride.