Hi,
the accessory for the ni 6534 family are the SCB-68 (connected using the SH68-68-D1 cable) or the TB-2715.
The cb-2162 is used with NI-655x and NI-654x family.
So, I think that you need a custom cable that connects directly your 6534 to the cb-2162 or a custom cable between SCB-68 (or TB-2715) and the 2162.
Best regards
AmbuA