Welcome to the forum. Provided it hasn't been broken off, it is a lever located at the bottom-rear of the left handlebar switch cluster. Designed so your left index finger can stick out forward and activate/press the lever. I'll see if I can find a picture to add to this post.Ok, I have looked and looked, can't find the ptt for the CB. I can listen, change channels, change squelch. Where the heck is that button?
this is a 2004 I picked up in October.