Speaker Wiring

I'm finally wiring my kitchen speakers in. My amp (Creek 4330 - 40W into 8 Ohms) only has one set of speaker outputs. There is a tape in and out by RCA connections. Because of the distance I'm running 10ga wires to the kitchen. I'm not sure I can find RCA connectors that will support that wire size. Should I just pair the speakers in the living room with the kitchen in parallel? Should I splice in some smaller gauge wire between the RCA/phono plugs and the speaker leads? If I do it all off of the same connectors there will be 3 speakers on each side, 1 in the living room JBL micron carat (4 Ohms), and 2 Energy V1.0 CM(8 Ohms nom 4 min). Also, I'm not sure what the nominal vs. minimum resistance on the Energy speakers means in terms of loudness. If the speakers really are 4 and 8 ohms then the 4 ohm speakers will be twice as loud right?