Sure. It's a bit messy because it was done with what I had here.
Also, pls don't get confused: the X5 has the E12 DIY attached but switched off.
So... you can see the FiiO adapter 3.5mm to RCA, then the blue coaxial cable. On the other side of the converter it's a Toslink connection to the M8.
This converter is 9V and connected to a power adapter. Soon I'll have another one with a small 5v battery. A shorter coaxial will also help to get rid of the mess.