All 5 speakers have the black/red wiring and the back panel of the receiver looks like this:
I've currently got just the front left and right speakers plugged into the corresponding inputs on the back right side, but I'm wondering if anybody can help me figure out how best to connect the other speakers - it seems like if I could find a way to convert the center channel's output to a 3.5mm headphone style jack there is a place to plug that in but I'm not really sure if that's possible, or recommended..
On the other side, my television's outputs are pretty limited - there is only a single headphone jack (which I've currently got splitting to red/white RCA which goes into the receiver) as well as an optical port and a number of HDMI ports.
I don't know if the current setup is even separating the left and right channels of audio through that RCA cable, it doesn't seem like getting full 5.1 surround sound is remotely possible with this setup but I'd like at least for all the speakers to output sound and ideally in stereo. I'm not averse to acquiring new parts but I'd like to buy as little as possible. Any assistance would be greatly appreciated!