how to connect strain gauge to HX711 module
Using the formula below:



You get the answer. R_1, R_2 and R_3 are known values, (R_2 is adjustable for calib. or can be), and R_x is your weightcell. 



Remember that your config. will only be a quarter bridge. You can find additional info on:
http://www.vishaypg.com/docs/11092/tt612.pdf
source: 
https://en.wikipedia.org/wiki/Wheatstone_bridge