GKEEMARS65 Pcs Compact Splicing Wire Connectors Assortment Pack Lever Connector Kit, Quick Wiring Connector for AWG 28-12

Are these UL approved

Seems like you'd be asking to burn your building down with these. Are they up to code anywhere in North America?

Ok to use in automotive applications? For example: off road light connections? Can they withstand getting wet without shorting out?

Do these control the direction of the flow of the electricity? The arrows and terminology of "x in" and "x out" give that impression. I'm a newbie.