[Sony Slave]

I'm thinking about going all out in order to get the best audio experience possible(that my budget allows). I choose the Little Dot I + because it is supposed to pair well with headphones I have,which have a low impedance  the Shure SRH440.
 
How exactly am I supposed to pair them together, as in what wire goes where? I got confused because I saw that the Modi used RCA, but Little Dot I + used AV.

 
I am a complete noob to this, any help would be appreciated!

 

[PurpleAngel]

I believe at the back of the Little Dot +1 there are RCA inputs?
(may not look like normal RCA inputs)