The "A" care would be the front but I dont think it should matter at Zurich. I thought there was an escalator neer the middle of the tracks that will assist in connections. I dont really remember but appears on the following map. I should remember it as many times as I have connected there.....

http://www.sbb.ch/content/sbb/en/des...r.download.pdf

Only issues I have had on connections had to do with going from the local trains to the ones out on tracks 50's. That can be quite a hike.

Also, I recommend the SBB app on your phone. I find it really helpful. I would not be concerned at all with 9 minutes.