so my 2.0A prints PLA without heating problems (the longest print had been 5 hours), but i am not happy with the quality of it. I had tried using a small table Fan in different locations, and the side where the cold air hits is perfect, but the other side not...

So i am thinking of attching a fan directly to the print head, i had already found a model on Thingiverse, but how can i attacj the power ? I want to use the cables at the printhead carriage, but which of them is + and which ones - ?

Or any other ideas how to get power to it ?