cd changer input stock 2003?

[Rufer]

Hello, I'm going to be using the cd changer input of my 2003 Tacoma's stock stereo for an aux in.

From what I've read, sometime during production in 2003, Toyota changed from the large, rectangular 12 pin plug to a smaller, square plug for the cd changer.

Because I only want to disassemble the unit once but need to know what kind of plug I should order, is there any way of knowing at what point during the production year or what models this affects and when?

Thanks for your help.