Drivers side lower control arm bolts on 98 Stratus
 

Hi,
I'm trying to keep my 98 Stratus alive at almost 170K miles by replacing the subject. After fighting with every single bolt most of the day yesterday I got them all off with the exception of the one as viewed from the driver's side wheel (leftmost corner protruding horizontal through the control arm). I can't seem to get access to the nut on the backside of this bolt no matter what I try, at least not with the tools I own. I see that Dodge has a small cut away for access to this nut but I still cant seem to get a wrench or socket in there to hold it.

Does anyone have any suggestions on tools to do this job or even what size this nut is? Thank you!