Being an electronics learner...a step up from a newbie...I was thinking of using these
https://www.adafruit.com/products/1495
![Image](https://www.adafruit.com/images/970x728/1495-00.jpg)
For the positive side block:
1. Left fan positive lead
2. Right fan positive lead
3. Positive lead to Ultimaker fan connector
For the negative side block
1. Left fan negative lead
2. Right fan negative lead
3. Negative lead to Ultimaker fan connector