OP
Do Not berate yourself , the best make mistakes, it happens.
As suggested call Dan tomorrow if possible and I suggest leaving everything powered off for now just in case any further accidental damage occurs.
Sorry for your misfortune, it really sucks when you have an issue that you feel was all your fault but....
You did say it was making a static type noise BEFORE you disconnected the umbilical so might not be you at all.
Do Not berate yourself , the best make mistakes, it happens.
As suggested call Dan tomorrow if possible and I suggest leaving everything powered off for now just in case any further accidental damage occurs.
Sorry for your misfortune, it really sucks when you have an issue that you feel was all your fault but....
You did say it was making a static type noise BEFORE you disconnected the umbilical so might not be you at all.