The last couple of days I may be coming across as a bit dim

cos I had to ask for help with a clicker and now...help witha canny collar!!
My friend bought one she has never used; I was explaining i wasn't looking forward to our scottish walks due to how much badger pulls (one arm def longer than the other now!

) she produced a canny collar, but has never used it and has lost the instructions.
So does anyone have a quick fire step by step guide to getting one on the head of a jack-in-the-box dog who cannot sit still and likes to eat through leaders/harnesses etc.
I honestly cannot work it out there are bits of material and clips everywhere!!!!