I'm trying to plug my PC into my surround sound. It's a lx3750w, the manual is here:

I can't figure out what the input jack is, it looks like an coax SPDIF but it's green? The manual isn't clear to me.

My PC has an optical spdif ( TOSlink ?) so i'll need some sort of converter, but I don't want to buy one until I know what my surround sound needs.

Any help would be appreciated.

I've taken a photo but I can't seem to upload the image, so here's a link to it on google drive: https://docs.google.com/file/d/0B-XA...dxaXREM0U/edit

Many thanks.