CCS/MSP432P401R: How do I know which pin and port correspond to the LED light?

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Newbie here. New to MSP as well. I am looking at the sample code for blinking the LED

int main(void)

{

    volatile uint32_t i;

    // Stop watchdog timer

    WDT_A_hold(WDT_A_BASE);

    // Set P1.0 to output direction

    GPIO_setAsOutputPin(

        GPIO_PORT_P1,

        GPIO_PIN0

        );

    while(1)

    {

        // Toggle P1.0 output

        GPIO_toggleOutputOnPin(

            GPIO_PORT_P1,

GPIO_PIN0

);

        // Delay

        for(i=100000; i>0; i--);

    }

}

So you can see that port 1 and pin 0 are selected . How do I know which port/pin correspond to the LED?

Also what does this mean? WDT_A_hold(WDT_A_BASE);