After adding a new serivce, selecting Re6st and the latest version, you will reach the configuration screen. Set Software Type to Re6st Token. As mentioned, the token is actually a slave instance of the Registry (and in case of COMP-0 a first gateway node).
Select the Computer on which the Registry of your SlapOS Master was installed at the bottom of the page, then click Proceed to instantiate the service and be forwarded to the list of current services. Refresh the page, it may take a few minute for the node to be instantiated and the token to appear. It is a single use token to connect one other node to the network.
You can follow the compilation by looking at the
# tail opt/slapos/log/slapos-node-software.log -f