jonas's RX

Guys has anyone pulled the old spoiler off?
the first picture is the new spoiler replacement
I bought which has a middle cutout but no
plastic gasket . Not exactly sure how to pull off
the gasket on old spoiler

I got the 5 bolts loosened but in the middle where
the 3rd brake light sit, there is like a black plastic
gasket that sit right on the white plug for the 3rd
Brake light

Does anyone know if it pulls off or slide off?
last Area not sure how to pull off

GX460PREM

I have a rear spoiler with LED brake light for sale if anyone is interested.