Thanks again for all your help. So an update...
I have more projects than I have time and apparently knowledge, so I tried to outsource this (simple?) horn project. The dealer told me they could probably install it, but they are about an hour away and not the easiest people.
There is a place literally 5 minutes from me that is a repair shop doing odd jobs on cars and motorcycles. They ride I know as I've seen them.
I gave them exact instructions, even gave them photos of your job and some of our exchanges, along with the wiring harness and specific details.
Good news--they installed this in less than an hour for me at a reasonable rate. That's good.
Bad news-- They ignored my instructions, stating this horn was just plug and play, and they never took the wiring harness and fuse/relay (I think that came in the box) out of that box. I bought this all as a package. They insisted this was plug and play despite the mfg not agreeing with that. The plug and play version of the horns I found all sounded unimpressive. This one was louder.
He told me if it doesn't work right, just bring it back.....I asked why not just do it the way I asked while you had it here per my request, and got the "it didn't need to be done that way...it should be alright" approach.
So, yes this does honk and it does sound very loud. I assume it's as loud as it should be (not sure if doing it per the instructions would have been louder. Concerned about the blue eventually blowing, but it didn't so far based on me honking it about 30 times with the bike running and not, for different durations. Not sure if it will eventually blow the fuse.
Also not sure if this will cause future issues with the oil change. I believe you mentioned the old horn was in the way with oil changes. Looks like they removed the old horn, but just connected the wiring.
Thanks again for your tips.
One pic of the finished product: