i have tv with no hdmi arc or optical connections. I have 3 hdmi ports on my alba tv, 2 are connected to my cable & blueray player. The maxwell mxsb-252 soundbar has 3hdmi in & 1 hdmi out ports. How do i connect please, my idea was to disconnect the dvd & cable hdmi from rear of tv & insert to the hdmi on s/box & use an hdmi connection from s/box hdmi out to the now vacant tv hdmi I have ordered the s/box, but maybe i should cancel if it is not possible to hook up.