Keep dual monitor position settings

I can change the position of my dual monitors using arandr. However, I have to do this every time I log back in. I'd like to keep the configuration settings without having to do this every time.

I didn't have a .config/monitors.xml initially. I tried adding it with the correct settings, but it still doesn't work.

I've also tried looking at other answers like this one, but I don't have any of the files he's referring to including /etc/lightdm/lightdm.conf which seems to be the functional one.

Is there anything I can do to keep these settings or have my machine respect .config/monitors.xml?

I've also tried updating .profile to include the xrandr calls, but these will only run when I open the terminal -- not that I could get them to work properly anyway.

I've also tried changing this via nvidia-settings and clicking "Save to X configuration settings," but the settings still do not persist after relog/reboot.