Has anyone worked with HX711 load cell amplifier / weighting sensor through Arduino?
If you look at the picture of that breakout board, you can see that it is mainly exposing the pins of the ADC. 



For example, DT and SCK are connected to pins 12 and 11 of the IC. So check the datasheet for HX711 and you'll find the description:



Reading through the datasheet should tell you more than you need to know about how to use this device. Sparkfun also supplies a breakout, which has a tutorial. The board is very similar to yours and you can see what connects where and follow the example given.

The ADC is two-channel but only one is used, so the B+ and B- inputs, which are for the second channel are redundant and therefore do not need to be connected. Look at the equivalent Sparkfun schematic to see what pins are used for which purpose and then do the same thing with those connections on your board. Then the Arduino library and example code should work in the same way.