Hey, long time lurker first time poster!

I found one of these units on the side of the road in one of the local 'council clean-up' programs they have, and I was wondering if anyone had a pinout for the unit?
It has 3 connectors on the back, a single one on the left (I think this is the CD stacker plug?) and 2 in the middle.

Also, is there any way to get rid of the 4 digit code on the radio without having the VIN number of the car?

I really want to put this in my 4agze AE92 corolla, as I'd like it to look nice and factory neat inside.

The part number is 86100-YC280