Does the base stereo support an external CD changer?

[Ukraine Train]

I have one of those AUX input adapters that plugs into a stereo's external CD changer control plug left over from my old Liberty. I need to order the adapter harness to fit up to the Toyota stereo but I want to confirm that the base CD/cassette stereo from an '03 has this plug. I haven't been able to find a definitive answer.

Thanks!