Tail Light Question

Ok.. Since nobody seems to know what wire lights up the rear brake lights, and/or how the speakers go in...... Maybe someone can answer this question...

My CVPI is a 1999.. Every other one i've seen has been the type with the yellow signal area on the bottom of the taillight assembly (Apparently a 4 bulb system)...

Mine however, has only a 2 bulb, completely red (apparently 2000 model year change) setup.... Everything works and flashes properly.. any ideas how/why? Manufacture date of 5/99 also..
JIC that makes a difference..

I have the information on the lights, but (since I work with local Police )I am not willing to give it out for flashers if you are using it on a personal vehicle. Sorry. If you search the internet, there is no doubt diagrams out there.

It's a 99 CVPI that is for shows... Not road legal/no plates.. But no big deal.. I'm more concerned about the rear speakers anyway... And apparently through reading a different forum, my tail lights have been changed to the 2000+ style 2 light instead of the 99- 4 light