http://www.ebay.com/itm/DIY-Eyelet-P...item4d0b26025a

They are not costly items.

I have reservations in using a craft tool (you can buy a martha stewart brand one if you want...) for an electrical connection but that is what they are using. They do however recommend, solder connections, as a first option. I personally would suggest rivets not little craft eyelets but solid copper rivets they are far more costly and complex to use.