MSPM0C1103: Enabling different ADC input channels via sysconfig

Part Number: MSPM0C1103
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hello,

I am programming the MSPM0C1103 using the most recent version of CCS.  According to the datasheet, ADC analog input channel 5 is mapped to pin PA28.

Using Sysconfig, I would like to configure the ADC to use this input channel. However, in SysConfig, the GUI only lets me select pin PA26, which is analog input channel 1. I have tried adding more ADC channels, but that is not possible.   Any suggestions on how to solve this issue? 

Thanks,
A