It’s likely for sure, but not a given as the car park is a separate structure that over the years has acquired various ramps etc connecting it to the terminal.
T1 MSCP is a separate structure constructed in the early 70s and is joined to the original 1962 terminal by ramps etc. However the basic structure of a car park was modified before construction to contain what are now the T1 check in hall, baggage claim and arrivals hall within the structure. So the two buildings are inextricably interlinked.
And for the reasons outlined by Chaps 1954, there is no chance of the cargo centre (or any other major development) going southside into Cheshire.
The line of development to the west of the airport was set by the fuel farm construction first; this was adjacent to the old west side hangars. The FLS hangar and Cargo Centre came later in the only area at the time which could be developed easily in terms of planning permissions and cost. There were no Master Plans to speak of in those days.