When a single secondary TAP is selected, it is effectively connected to the TDO of the ICEPick TAP.
When one or more secondary TAPs are selected, they are linked from the lowest numbered TAP to the highest numbered TAP.
The lowest-numbered TAP selected is connected closest to the device-level TDI (except for ICEPick), while the highest numbered TAP is connected closest to the device TDO.
Any selected TAPs within the test bank are linked before any TAPs within the debug bank (for example, DAP).