It sounds like you are referring to the high-pressure switch. As far as the pics, once the retainer bolts are removed, it will come apart. If possible, tap around where it mounts with a light hammer or better yet, a rubber mallet.
Now, I attached a pic below. It shows what each component connects to. I highlighted where I believe you described, between the compressor and condenser.
Take a look at the pic and let me know if it helps.
Also, make sure that it is running to the compressor. I'm trying to remember where the pressure sensor is located, and I can't picture it near the oil filter.
See pic below.
Image (Click to make bigger)
Wednesday, April 20th, 2022 AT 7:27 PM