so i'm having a problem - i think i got the wrong brake lever. i've never done this before, and any advice would be appreciated.
i believe i have caliper brakes, and was trying to put inline brake levers on my new riser bars. my suspected mistake is that i should have gotten a...different kind of lever. can someone make a suggestion? here are pictures of my attempt:


i noticed that boston fixed has a small nut or something on the other side of his lever. would that be something i need to hold the cable and allow the lever some leverage (har, har) to pull the brake, or do i flat out need a new type of brake lever?