Oh god, is it April already?
Also, note what happens to the 4000D: there for sure there is a mistake, eithr in the color of the jack, or in the label on the case.
Audio is completely standardised.
0,3 come out of the left/white/L jack.
1,2 come out of the right/red/R jack.
Any other situation, and someone's been playing or replacing components. Or it's the 1st of April. The only possible confusion assuming standard equipment is that some Amiga models are designed such that left is on the left viewed from the front of the machine, not the back.
Can you please spacify your Amiga models?
All of them.