I just got a pair of R-26FA's for Christmas. Each Speaker needs 4 wires. Red/Black front on lower terminals, and Red/Black on (Extra SP1) F. Presence / Zone 2 (as labeled from your Yamaha RX-V683 manual on line. I bought some banana plugs at Best Buy and put them on either end of the speaker wires. You have to remove the little plug on speaker to use them. It makes disconnecting either end much quicker.
I just started putting together a home theater myself:
Yamaha Aventage RX-A760
Looking for a center speaker next...