Accessory Power (keyed)

I’m in the process of installing a sounder. I found the constant power on the side of the fuse box and tapped in to it. But my darn soundbar has a light on it and shows power all the time. So I want to be able to turn off the power. Is there a “keyed” or accessory power that turns off with the key? If so where might I find it.

I have a 2008 gem e4

Going fishing? Was there a Gem Pontoon Float kit I was not aware of?

But Ok- If you insist:

Just for future reference-
The magnifying glass tool in the upper right and the keywords “acc connect” brings up almost the same answer. Maybe that’s where I got it from?

thanks - need to work on my search skills.