Help with t-rex miner?

So i've recently been trying to get into mining a little bit just to try it out, but everytime i launch the t-rex file it says "Can't start t-rex, no pool was found" in the folder there are like 15 different bat files from 2miners, to ethermine, to flexpool, etc. so i'm not sure which one im supposed to edit or how really to get it to work in general tbh, can anyone be of assistance not sure what i'm doing wrong.