Ikelite iTTL Instruction Manual page 6

Troubleshooting/Inserting Pins
- If intermittent or loss of TTL operation occurs, insert the 2 gold plated
pins into the Nikonos Connector End corresponding receptacles as
shown below. With the Index Recess at the bottom,
the pins should be at the 10 and 2 o'clock positions. Once the pins
are installed they cannot be removed.
- Connect the Adapter to the housing bulkhead, page 3.
Nikonos Housing Bulkhead
Gold Plated Pins properly inserted in Receptacles
6
Spring-loaded Contacts
Diagram 2
Nikonos Connector End
Index Recess
Gold Plated Pins