Settings for LG G2, using aux in car

I know this is a common issue with my LG G2 phone - there's basically only one speaker, to my understanding.  When I try to listen to music on my phone through my car radio, by plugging my phone into the aux with a 3.5mm audio cable, the sound usually only comes out of one speaker.  If I jiggle it and mess with it, sometimes I'm lucky enough to get it to come out of both speakers, but usually not.

I downloaded the paid version of soundabout, after reading that it could help fix the issue, but so far it hasn't.

Does anyone know what settings I should use with soundabout, for this issue?

I don't have a Bluetooth option in my car - I just plug the phone straight into the aux via the jack.

Thanks.

This is really a connection issue. SoundAbout can resolve stereo/connection issue. Either the 3.5mm wire is loose or the pins aren't completely compatible.

3.5mm cable compatibility issues are mentioned in this thread. It has links to various adapters as well.
https://soundabout.forumotion.com/t20-wired-headset-microphone-not-working