Generally to find out how a macro define is used, you can do a global search of the macro name (e.g. OSPI_HW_VERSION_BASE) and that will give you an idea of where the macro define is used. Then you can clone it into a different macro and just duplicate the sections where it appears.
From the updated message and it seems you were able to figure things out. The wire definitely needs to be sufficiently thick otherwise the resistance on the wire will drop too much voltage.