Hey bud,
That pic is of a parallel connector. Those connector will increase the mah (adding them) of the pack, but do not increase the voltage.
A series connector will add the voltages of the cells together, which will increase power to the motor(s). This is what you want...
Here is a linky to read -->
http://en.wikipedia.org/wiki/Series_...allel_circuits
jenson40's link above my post is the correct one...
Hope that helps!