AI23 was on the F1/1A/2/T4
AI23b on the F3/F6/T5
They both looked pretty much alike unless you had to service them, and like the unit in the photos as far as I recall.
Yes, hundreds of wire wraps to connect the modules. More reliable than multi way connectors, but even with the electric wrap/unwrap tools time consuming. Strictly 'modified wire wrap' - the first turn on each end included the insulation.