How to use the debug signal of an accelerator

[LucaUrbinati44]

The esp_accelerator_specification.pdf mentions a "debug" signal as a way to allow an accelerator to communicate some data to the processor for debugging purposes.
However, it is not specified anywhere which is the memory-mapped address for the debug register. Moreover, a small example of the usage of this register between an accelerator and a processor is missing.

Thank you