By the way, those photos aren't from those sound blocks i have

Like the circled one on the top left

Hello, i've recently bought volvo s60 audio with CD, before that i had a simple one with tapes. I removed my audio but there where 3 connections. Little one fit perfect on the other audio and green connection as well. But the brown one didn't, the CD audio had 2 connections who look like in 1st pict...