Solution
The SHC68M-68F-RMIO is designed to be used with R Series FPGA cards (specifically, the Multifunction IO port on those cards). Its pinout is not compatible with X Series DAQ cards, like the PXIe-6356.
The SHC68-68-EPM is a cable designed to connect Multifunction DAQ cards (like the 6356) to a terminal block (like the SCB-68A).
That being said, neither of these cables would be suitable to connect to an RTI-12307. The 12307 has 2 MDR connectors. There are several cables available to connect to MDR connectors on that RTI:

In your case, you could use either the SHC68-4MDR26-AI32 cable (which is only capable of routing AI channels) or the SHC68-2MDR26-EPM cable (which is capable of routing AI and DIO signals).
That being said, a better option would be to not use the RTI-12307 at all. Instead, you use the RTI-12309 and an IX cable. The configuration would look like:
You'll want to verify the pinouts of the cable to see if it gives you access to all the signals you need