return values from mpsl_fem_tx_power_split()

A pointer to the structure of mpsl_tx_power_split_t is passed into this function. I am not 100% clear on the documentation on this variable. 
The value returned from this is 

    /** TX power to be applied to the RADIO peripheral. */
    mpsl_tx_power_t radio_tx_power;

    /** FEM PA power control.*/
    mpsl_fem_pa_power_control_t fem_pa_power_control;

The value in radio_tx_power would be loaded into NRF_RADIO->TXPOWER , correct?
My question is if the value in fem_pa_power_control would be moved into the CONFREG0.TX_GAIN value in the FEM (nrf21540) ? 
A M
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