Locate the ADG1633 subcircuit in lib\sub\ADG.lib, and study its netlist. Trace back from node 2 (aka: SA or your Ay) to figure out where the pin voltage is coming from. You can plot internal node voltages and part currents from the subcircuit by 'Add Trace' in the plot window - refer to the SPICE Error Log to map them back to the subcircuit.
If that doesn't help, you can reverse engineer the subcircuit as a hierarchical schematic from its netlist by adding the parts one at a time in netlist order to a new schematic called myADG1633.asc, labelling each new node you encounter. After each part has been added, check the resulting netlist matches the subcircuit. Finally, create a new instance of the symbol (as myADG1633.asy) in your working directory, flip its type from 'Cell' to 'Block' and strip *all* attributes, then rename the pin nodes in your myADG1633.asc sub-schematic to the pin names defined in the new symbol.
However, I think your time would be better spent finding an actual 4053 SPICE model, porting it to LTspice and constructing a symbol for it.