I ran across a listing for a used fire truck on Craigslist and was looking at the lightbar mounted on top of the cab. The lenses made me think it was possibly a Code 3 SD because of the clear cut outs on each end. What threw my off was how close the forward facing clear cut outs were to the center spreaker cover. I also noticed the two amber cut outs on the rear near the center speaker cover. Any thoughts?