Shielded cables and connectors.
The shielded cables are consistent with those used on American aircraft radio receivers. Whether they meet military specifications or are more likely to have been in a civilian aircraft is still being researched. The connectors have been identified as products of the Howard P. Jones Company of Chicago, Illinois. Known as ”Part Number 101”, they were first produced in the mid-to-late 1930s (exact date not yet determined) and remained in use through Wolrd War II. This type of connector was used for certain Bendix, Western Electric, and Sperry receivers. Earhart used Bendix and Western Electric receivers. Further research is in progress.