Since the CTL switch is marked, it must also be in the IO list.
Please look in the circuit diagram on the last pages for the IO list, search for CTL and you will find the IO number there. I think 1290 is not correct. In my documents it is IO 10, but there are different countries, hardware and software versions etc.
An example for IO list:
https://1drv.ms/b/s!Arj9j2ORAi8Ah-k_krHEbpnGlzTSQw?e=ljV32N
Can you please send me the complete circuit diagram?
Regards
