In fact DfT published the detailed plans of the Liverpool junctions in the previous October 2020 HS2 Phase 2b design refinement consultation response, which can be downloaded from
Seeks views on proposed refinements to the Phase 2b (Crewe to Manchester and West Midlands to Leeds) line of route.
www.gov.uk
See Section 2.4, Passive provision for two junctions at High Legh, Cheshire.
The map, Fig.6, shows that the east facing junction will be just south of M56 J7/8 and the south facing one pretty much co-located with the junction between the HS2 Golborne spur and Manchester spur.
It also shows provision for a bridge where the NPR line crosses the Golborne spur.