Example configuration file, fiddle as needed

wildfly-config.xml

<?xml version="1.0" encoding="UTF-8"?>

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<configuration>
    <authentication-client xmlns="urn:jboss:elytron:1.0">
        <key-stores>
            <key-store name="keystore" type="jceks">
                <resource name="keystore.ks"/>
            </key-store>
        </key-stores>
        <rules>
            <rule>
                <match-protocol name="remote+http"/>
                <match-host name="localhost"/>
                <match-port number="8080"/>
                <set-user-name name="user"/>
                <key-store-credential key-store-name="keystore" alias="user"/>
            </rule>
        </rules>
    </authentication-client>
    <jboss-ejb-client xmlns="urn:jboss:ejb-client:3.0">
        <discovery>
            <static-ejb-discovery app-name="my-app" module-name="my-module" bean-name="MyEJB" uri="remote+http://localhost:8080"/>
            <static-node-discovery node-name="node" uri="remote+http://localhost:8080"/>
        </discovery>
    </jboss-ejb-client>
</configuration>