I'm just free handing it most of the time. Check to see what gauge your lancets are. Sometimes the human lancets/devices come with tiny little 31 or 33g lancets. I've had a lot of success with the largest lancet I can find which is 26g. (The lower the number, the larger the needle)
I'm sure someone on here can provide the visual with the "sweet spot" to poke. My Mocha has long black hair so it's fairly hard to see, but I go about 1-2mm from the edge of the ear. You'll be able to feel the lancet go in when you free hand. Always put a cotton ball or something on the other side of the ear because you will probably poke all the way through at least once. We've all done it. You just don't want your finger to be on the receiving end of the lancet.
I also use magnifying glasses with a light so I can see what I'm doing.