Wiring Part I - Printing in Plastic: Build Your Own 3D Printer - page 313

Figure 17-12. Secure the thermocouple wire to a bolt with a tie.
After securing the thermocouple wire, attach the red and yellow ends to the Extruder Controller, as
shown in Figure 17-13. Insert the red wire into the screw terminal labeled T- (Tee-minus) and use a small
slot screwdriver to tighten down the screw to hold it in place. The yellow wire goes into the screw
terminal labeled T+ (Tee-plus); secure it in place as well.