2 load cells and sparkfun load cell amp

the sensors that i am using have three wires: red, white and black. in the attachments there are some pictures of how i connected them.

the beginning of the calibration code is as follows:
#include "HX711.h"

HX711 scale(6, 7);

float calibration_factor = -7050; //-7050 worked for my 440lb max scale setup