https://www.jwfacts.com/watchtower/mediator.php
Where is Jesus in that statement?
The 2010 book God's Word For Us Through Jeremiah continues to present this teaching, though so subtly that many Jehovah's Witnesses do not seem to make the connection that Jesus is not their mediator. It explains that Jesus mediates for the new covenant, which is for spiritual Israel, whom the Watchtower teach include only the 144,000.
"... the new covenant is between Jehovah God and spiritual Israel, with Jesus as its Mediator." God's Word For Us Through Jeremiah p.173
Under the heading of Mediator in Watchtower Index 1986-2000, there is the subheading "for anointed only:".
This remained the case in the 2016 index online at wol.jw.org Watchtower Index 1986-2016 .
Most congregations no longer have any of the "little flock" to associate with and the reality for Jehovah's Witnesses is that salvation comes from following the Governing Body, the leaders of the Organization. Jesus role as mediator for the Anointed alone is used to underpin the concept that following the directions of the Governing Body is necessary for salvation.