Component: L16H1_ATTN
Hook: blocks.16.attn.hook_z
Layer: 16
Head: 1
Role: Tertiary C-transfer backup head. This head carries C-related signal through its last-token attention to the third operand, but it becomes clearly load-bearing only after the stronger C-transfer routes L15H3 and L15H31 are suppressed. Its output is less cleanly helpful in the full circuit, suggesting a mixed or context-dependent C-support role.
Additional note: Backup (Tertiary) C-Transfer head at Layer 16. Present in the localized attention heads list in the Paper Tab. 4.