See image above - I have main location "T" and within that location I have the engine location "E"

My suction hose formula is wrong, missing the hyphen, please ignore that it has been fixed...

However, I would like the hoses shown here going into and out of the tandem hydraulic pump to have the prefix "E", not "T".  Everything on my entire drawing has the "T" prefix and I need that prefix to change to the sub-location for each of these lines.

Any help is appreciated.