DIY overclock speed controller for double the power (shunt mod)

The speed controller originally belonged with a little 300w motor, and I decided to put it on my homemade e bike for the esc, but the wheelchair motor I have on the bike was very sluggish with this esc having a current limit and not being meant for such a heavy load. See how I do a shunt mod to increase its output, and parallel mosfets for longevity Music in background: turn up burn up by Diamond Ortiz