69 camaro marker lights

[aany001]

Merry Christmas everyone. I have a couple hours to burn so trying to install my marker lights front and rear with billet trim. Wanna know if there's a gasket on both sides of the fender inner and outer? I have the gasket that goes between outer billet trim to outer fender but wonder if there's one between the lense itself to the back of the fender? I just don't think the outer gasket will seal up the rear lense from keeping water out. I hope this all makes sense.
Thanks