Led tv

my uncle just bought an led tv which doesn’t have an inbuilt speaker. he has a harmon kardon home theatre system a dvd player and a set top box which he wants to connect in such a way that the video from the dvd and set box comes through the tv of course using hdmi and the audio from both of them through the home theatre. the home theatre has 2 hdmi ports. how should the connections be made? plz help asap

What type of connections on each do you have?

all of them have hdmi ports and av ports. so tell me how should i mkae the connections?