Hi, I've just bought this cab and an Ironball head. Here's a picture of the back: https://ibb.co/MCKFQH4 I'm not sure how to connect them... and I'd like not to blow up anything. Is the Input input of the cab (left one) a 16 ohm input? What about the Thru input (right one)? Is it an 8 ohm input? Can it be used by itself? How can I use it? Thank you!