[Plugin: WP Photo Album Plus] How can I left justify slideshow photos in sidebar widget?

I’m putting together a site at danzpartychicago.com.

I would like to try left-justifying the slideshow photos in the sidebar widget.

In Google Chrome, I can see the code for the wppa-container and can click off the ‘margin-left: auto;’ and get it to do what I want.

I’m guessing this is generated by other code which, because I’m a novice at .css, I haven’t yet found in order to make the modification.

Can someone point me in the right direction?

https://www.ads-software.com/extend/plugins/wp-photo-album-plus/