PCCM+ Install on 2001 Boxster with DSP

[mforester]

Hello,

I have a 2001 Boxster that I just installed PCCM+ in. The car came with the CR-220 radio, Hi-Fi sound system (490), Digital Sound (680) and the remote CD changer factory options. The PCCM+ head unit powers up fine but I don't get any sound from the speakers. The installation instructions are horrible and I had to redo the connections a couple of times. Here's a list of the things I determined while doing the install:

1) The alarm connection to the radio frame only needs to be removed and taped in cars that have PCM1, my car doesn't have it so I left it connected.
2) The ground line they instruct you to add to the amp connector is only needed on cars with PCM1, my car doesn't have it so I left that connection alone.
3) The Sirius/XM tuner connector replaces the blue antenna connector in the stock 3 connector block. I removed the stock blue connector and replaced it with the Sirius/XM tuner connector and the connected Sirius/XM tuner I bought from Amazon.
4) I installed the MOST box on the frame and connected it to the PCCM+ head unit, my car does not have MOST but this shouldn't hurt anything having it connected.

Here's a link to the installation guide - https://static.nhtsa.gov/odi/tsbs/2020/MC-10179274-0001.pdf

Anyone here install PCCM+ in a similar car and come to different conclusions, have issues getting sound or have any advice?

Thanks in advance!