Every journal has its own dashboard in Publons. After subscribing into the Publons, via the "Dashboard access", the publisher is able to receive a direct link for sending to the EIC. It is called "Journal Admin access Link". The publisher must send this link to the EIC. Then EIC is able to register and activate his/her account and access to lots of facilities in the Publons.
EIC needs to have a link from Publisher to access his/her account.