Other option - Simple - straightforward. Your car will retain it's factory radio and look. It will be done correctly and you'll never have to worry about it again. You don't have to cut/splice wires and screw up the wiring harness. You won't have battery drain, you won't have a stupid looking aftermarket radio with all its nonsense of weird lights, screwy looking display and miniature disco balls.
Send your -210 to Becker Sound next door in New Jersey. From their website:
Porsche Radios 1996 - 1998 CR210/CDR210
Radios from this time period were not manufactured with a simple rear- panel connection for aux. The CR210 radio model can be modified for either a hardwired AUX or Bluetooth streaming . The CDR210 can be modified for Bluetooth streaming. For all modifications on these radios they will need to be sent in.
https://www.beckerautosound.com/
I have had these guys repair/restore several Boxster radios for me over the years. They are easy to work with and know what they're doing.