The current version Modus Toolbox does not support connection to on-chip resources. The only supported connections are SAR port pins.
Therefore, the pins out of port10 are not available for SAR ADC inputs.
Although it is not supported by the configuration tool right now, it can be done by software configuration of the analog switches.
For a reference please have a look at the ADC documentation of the PDL (in ModusToolbox open the configurator, select the ADC, on the top right is a link to the SAR Documentation)
At the bottom of the ADC overview page you will find example configurations for using the internal DieTemp, external Pins (AMUXBUSA/B) and even the OpAmps as ADC inputs.
Just a hint for optimizations:
If you are still able to change your design and don't use the internal OpAmps, you could use them as input buffers for the ADC (P9[2,3 or 4] to P9[0 or 6], P9 is already correct). Due to the design of the PSoC Analog routing, there are only two connections to the AMUXBUS, but you have 4 GPIOs connected externally. This means, that at the moment you have to witch between your "external" GPIOs in software an start the ADC measurement after the channel is setup. This is not a big deal if just a limited amount of sampling done, but if all pins are scanned each cycle it might generate unwanted software overhead. But in addition the ADCMUX has two direct connections to the OpAmp outputs. So, by switching your pins to the OpAmps, you can have the ADCMUX be hardware controlled and just wait for the results in your software.
Whoa, this is way more complicated than I expected and a bit disappointing I must say. PSoC is marketed THE micro controller of choice for analog applications but it seems like using more than 8 analog input reads in a cycle is not possible in a neat and simple way...
really really disappointing... I'll have to go back to Nordic semi I guess...
Thanks for your answer anyway
PS: It Seems that it is not possible yet with ModusToolbox but is it possible to configure P9 in PSoC Creator ?