Under hood fuse tap (or spare) for 15 amp circuit?

Looking for a spare slot or fuse I can add a tap to power a 15 amp circuit. I can easily see what each fuse is doing from the factory but really don’t know what fuse has spare capacity or has a bus large enough that I can tap into and load another 15 amps on. needs to be ignition on fuse. Any ideas?

Note: SRT8 300