E3d V6 Installation on SD3 with Sanguinololu motherboard help

You can splice into the lines for your existing extruder motor fan.
As for the E3D wires, cut the old wires (red/blue/white) out of the picture. The E3D v6 ships with everything you need aside from one 2 pin connector which connects to the board. So take that plug and cut it 6-10 inches from the plug then slip some heatshrink. A western union knot and solder will give a great bond for your news heater wires. Conceal the splice with said heatshrink, then plug it into the correct terminal.

There is no polarity for the heat/thermistor.

Thanks a lot guys i had thought thats what i had to to but i wanted to make sure from someone who actually knows what they're doing. Ive got it all up and running, just trying to calibrate the settings now!