Do you have an empeg sitting in front of you? Take a look at the connections on the docking cradle. You will see 3 sets of rca plugs. Front, back, and aux in. Hooking it up is best described here: http://www.riocar.org/modules.php?op=modload&name=FAQ&file=index&myfaq=yes&id_cat=3&categories=Car+installation+questions#11

Sean