I sent Lowrance the same question and here was their answer.
Thank you for contacting us.
The LCX-111C ethernet port was not active. Because of this, there is not a way to connect these two models together to share data through the ethernet. Please let us know if we can be of further assistance.
I hope this answers anyone else, with the same question.
Thanks for all your input Captainmusky. You are a great resource person for a lot of our unknown ventures with electronics.