Not able to understand "System event" mapping with "CIC0 Event inputs"

Dear All,

in "pdk_C6678_1_0_0_14\packages\ti\csl\example\cpintc\cpintc_test.c"

The following statements are present

1)  /* Open the INTC Module for Vector ID: 4 and Event ID: 63 (C6678) 59 (C6670)
     *     Refer to the interrupt architecture and mapping document for the Event ID  (INTC0_OUT3)*/
    vectId = CSL_INTC_VECTID_4;
    hTest = CSL_intcOpen (&intcObj, 63, &vectId , NULL);

2) /* We now map System Interrupt 0 - 3 to channel 3 */
    CSL_CPINTC_mapSystemIntrToChannel (hnd, 3 , 3);
    
2) /* We enable host interrupts. */
       CSL_CPINTC_enableHostInterrupt (hnd, 3);
    
I would like to know in which part of the document "SPRS691D"  does it mention that the
channel "3" is hard wired to host event "63". I am not able to relate the above operation
with respect to details present the table (7-39)

Thanks

selvaraj