LOL, relax, you don't need any instructions on this kind of thing. It's nature. There is no set place to put your hands. If you need proof, you don't even ...
A girl can put her hands where she feels most comfortable, while kissing. Some women like to put their hands on the head and hair of the person they're kissing.
There is no single place a woman should put her hands while kissing. Try putting your around your partner's upper body, or, if you are standing, the waist.