Inside a tube portion of the AC condenser.

No, the drier is serviced with a kit with desiccant insert and o ring to seal the access plug.
I have used the Four Seasons one from Rock Auto and from local auto store.

For my 2010 S80 3.2 the dryer is a desiccant bag inside the condenser. It comes in a sealed aluminium Mylar bag and it only has a 1 year shelf life. Don't open the Mylar Bag until you are ready to install the desiccant in the condenser. The cap that holds the bag in place uses a Torx T-70 fastener. ...

When I replaced the Compressor on my 2010 S80 I also replaced the desiccant bag because I read that a clogged desiccant bag can negatively affect performance of the AC system. And I read about flushing the system but I decided not to. But I did carefully follow the instructions on the compressor to ...