I BIG thank you for your help, really appreciated. It looks like the 3 pin connector was hidden underneath the side panel which unfortunately I couldn't take out but pulling harder the harness it helped. I do have the coax/DSP cable but I couldn't find the 6 pin connector.
Now, I plan to install the Blitzsafe module (DSP) for the AUX input and they claim that I need to connect only the coax cable and the 3 pin connector. Since my coax/DSP cable is already connected where the existing connection is going to go? On their site they do not mention the 6 pin connector, so I should be ok. It seems like the 6 pin is just for the non-DSP systems... I guess.