I don't have a need for your 3rd brake light but in reading your post it left me wondering whether this is an OEM Nissan 3rd brake light or an aftermarket light?
Several years ago I purchased an aftermarket LED 3rd brake light off eBay and it lasted about three years and then some of the LEDs stopped lighting. When I went to remove the assembly, both aluminum screw posts in the assembly broke loose and started turning where they were attached making the removal a bit of a pain. My aftermarket LED light turned out to be a complete POS. Luckily I kept my original OEM 3rd brake light and in the end I was quite glad I did as I used it to replace the LED one.
A bit more information about your light might be helpful to gain more interest.