Late to the party, but here’s a couple thoughts.
The OP pics 5-7 show that the major diagonal braces are acting against cable tension. It’s a pretty safe bet that a headframe’s main diagonals point to the hoist.
There doesn’t seem to be a door beneath the cable opening (for, e.g., trams & buckets & such), only a small hole & special roof section to permit the cable to enter.
There are no boiler stacks in the headframe building, so prob no hoist engine there.
The stacks are behind, in a separate building; so the hoist was probably there as well.
The small A-frame-like structure & sheave were, to my thinking, a hold-up means for the cable as it was conveyed to the hoist house.
Just an opinion,
Cliff