each of the binding posts on the back of the speakers and receiver should have a hole in them that you can pass the bare wire thru. You will have to twist the binding post red or plastic piece up a little until you see the hole, slip the wire in and tighten down the plastic nut to hold the wire in place.
Likewise you can get banana plugs or Spades from somewhere like monoprice to make the connections simpler. With banana plugs you simply push the ends into the holes on the top of the banana plugs.
Remember that if you do bi-wire, you HAVE TO take the little brass piece thats connecting the binding posts together out. If you don't remove that brass piece, you could damage the spekaers.
Dynaudio Focus 260s, Focus 210C, DM 2/6, Hsu VTF3 MK5 HP, Oppo BDP-103, NaimUniti 2, Naim Stageline N, Pro-ject 2xperience Classic, Marantz SR7007, 60" 4K Samsung LED LCD