Ford Galaxy Intercooler Problems

Hello, please could you pin point out exalty where the coolant drainage plug is,Ive looked everywhere and I cant find it,please help?.

Hello Ive found the lower pipe to flush my coolant system and Im not sure which pipe to disconnect because nothing came out,there 1 pipe on left and 1 on the right,i done both and still nothing came out,is it the right pipes or are my...