Lexmark 4I3 - Manual (Page 146)

Notes:
a. There is no specified “input” or “output” end of the connector.
You can attach a signal cable to either or both ends of the
connector. You can connect another device to the unused
end of the connector.
b. The V-connectors are “self-terminating” and do not require
you to set a “terminator switch” which might be found on
other printer products.
5. For Models 102 and 1I1: Turn the cable connector clockwise
until it locks into place.
2-6 User’s Guide