I bought these off Minispares thinking it would come with instructions, but no.

http://www.minispare....aspx?pid=33578
http://www.minispare....aspx?pid=36941
So Basically how do these work with each other? Or am i missing something?
Thanks for any help.
Ps. wasn't sure about putting this in Technical, But didn't think its really a "proper" problem, so feel free to move.