Compiler/MSP430FR5969: Place part of a structure in specific memory location using DATA_SECTION pragma

Tool/software: TI C/C++ Compiler

I'm familiar with the DATA_SECTION #pragma directive and have used it.  What I want to do is just put part of a structure into a specific data section, specifically into non-volatile memory.  For example this structure.

typedef struct 
{
    uint16_t RegA_NonVolatile;
    uint16_t RegB_Volatile;
} RegStruct_t;

static RegStruct_t RegData;

// THIS WORKS, BUT PUTS THE WHOLE STRUCTURE IN customNV, not what I want.
#pragma DATA_SECTION (RegData, ".customNV") 

// THIS FAILS AT THE PERIOD
#pragma DATA_SECTION (RegData.RegA_NonVolatile, ".customNV")

The error that I get is "expected a ," right where I have the dot drilling down into the structure.

Is there any way to put just one part of a structure into memory using DATA_SECTION?