Any way I could have damaged my speakers?

As long as you did not let out the “magic smoke” your equipment is fine. Once you let out the smoke the equipment runs on you can’t put it back in lol. 

I ride and am not scared to fly through traffic but I'm terrified to tighten a rectifier or power tube socket with a screwdriver or dental pick, I don't know how to drain a cap. I always hear people use the term lethal power in the cap. Glad you didn't blow anything I do what you did sometimes but I know it's wrong, I don't like to turn tube amp off and then power it right back up, I know that can be a problem too

Good stuff james63 lol!

2 too many times for me, now I shut everything down before playing with Cables.

Always turn off the amp when changing wires at least, what I do, if I want to change wires on the safe side I turned off all my systems...