Remote for Panasonic SA-H30

[micltpls]

I bought a Panasonic SA-H30 secondhand several years ago. The other day I noticed a jack-type plug labeled Remote. I searched for a compatible remote by model # and purchased one via the Internet. The vendor says I should be able to just install the batteries and it should work--but it doesn't.

Is there something I need to buy for the back of the stereo or further steps I need to do to make this remote work?

I hope you like silly questions, because I’m sure this falls into that category!
(Remote model I purchased is: Panasonic EUR64595 A/V System Remote Control)
Thank you!