I'm trying to replace the A/C compressor in my '96 STS. I've read the posts on how to do this, and am trying to remove the oil filter adapter to get to the back of the compressor. I can remove one bolt and two oil lines but cannot find the second (upper I presume) bolt. Without removing the oil filter adapter, accessing the bolts on the rear of the compressor appears nearly impossible. Can anyone advise on how best to find and remove the bolts on the oil filter adapter? Thanks in advance.