Prestone Flush Inlet...which hose???

Hey guys....keeping you busy today....I know. Trying to flush radiator with theol' prestone.....which heater hose do I cut the fitting into? It says in the instructions to cut into the one going into the top of the motor...is theis right?

Thanks

The lower hose at the firewall is the inlet Ernie. Good luck!

Thanks Bob.....been a long a hard day....but I am done with the hoses.....man I hate those compression clamps!!