I can't take any pics of the trunk because I do not own the car anymore I just sold it and I took everything out of it.
As for the speaker, when I bought it, it had CDM1250 speaker plug on it. I just cut it off and soldered a 3.5mm on. There is no mod that you have to do, just cut off the old plug and solder on the new one. Easy has that.
Dan
***If anyone knows of anyone who would like to buy the console they can have it for 75.00 plus shipping. I no longer need it as I don't own this Impala any more***