I have a large 24VDC motor that I took from a small CNC engraver shown at Micro Center - Computers and Electronics. How can I connect this motor as a spindle to the CNC xPro board so that the board can turn it on and off? I looked at the xPro wiki at 2. Connecting CNC xPRO · Spark-Concepts/xPRO Wiki · GitHub but i'm not sure which circuit is best for the motor. I'm confused by the picture at https://raw.githubusercontent.com/Spark-Concepts/xPRO/master/wiki/xProV3(back).jpg because there is a black box and a yellow line below the motor. How can I connect the motor to the board? I'm building a larger CNC engraver using the ACRO System.