2009 C2S coupe 55K miles - all year, all weather driver.

With my Boxster S, it was the lateral arms... the ones that goes front to back. In the 197K miles of ownership, I think I replaced at least all of them twice and a few three times.

My 2009 C2S has a clunking/rattle in the right rear. I had it up on jacks and could not find it. I checked the three bolts on the top of the struts, I put a tire iron in there and twisted and wedged and no joint/bushing moved more than the others. Wacked with a mallet........

All OEM.... I replaced the sway bar links a few months ago.... improved but not really.

I am very sure it is a control arm. So, unless someone in Philly has some chassis ears they can lend me for a day, I want to just replace the most common offender. 997 331 043 01

So, which rear control arm goes first?
Any one know the torque values for this part?

Peace
Bruce in Philly