Greetings
dkkirby,
What a handsome fellow!
You have done well, for Bubba's injury. Since it has formed a scab, the healing has begun. There is no need to snip or trim any hanging flesh, as long as it's not interfering with his sight, breathing, or ability to eat. Anything not receiving a blood supply, will dry up and shrink, and then finally just flake off. You can spray it with some Vetericyn, as
Wyorp Rock, suggested, for a few days, if you are worried about infection. That shouldn't happen, as long as the wound is not pecked at anymore and remains clean.
A flesh wound like Bubba's, can take about four to six weeks, to heal completely. If you want to put him back with the hens, you should spray the wound with some Blu-kote (messy stuff, blue colored). That way the hens won't be so interested, and Blu-Kote is also an antiseptic. That little black spot you mentioned, was probably a scab from being pecked by a hen, or another rooster if you have others.
Hopefully, Bubba is your only rooster. Otherwise, you will have to keep him with the other roosters, or he'll be put out of the flock.
My rooster had a horrific piece of flesh ripped open, on his wattles, by another rooster. I flushed it with some saline solution to get the dirt off, dabbed it dry with some gauze, then, sprayed it with some Vetericyn. It took about 5 weeks to completely heal. Now, he has a little ruffle on that spot. It's his battle scar.
These are my thoughts on Bubba's wound. I hope I have been helpful.
God Bless