Website Showing no Padlock due to Mixed Content - HELP

Good evening community --
I've been attempting to fix this for awhile now, but I cannot find the Google Maps API insert that is causing my website to not display the "padlock" that shows it's secured, https.

In my findings, I have noticed the following address as not being secured so it's showing "mixed content".,10_2_0&rt=main.8

With that being said, I cannot find what is causing this to be displayed.

Anyone that is smarter than me know how to find what is causing this and get it fixed? is our website.

Thank you,