Apache CXF custom binding for enum results in error xpath evaluation empty target node

Question

I am pretty new to custom binding in Apache CXF or similar. I'm generating this in my Java Maven project using cxf-codegen-plugin. My XSD schema for classes are contained within a WSDL as shown below.

The classes get generated, etc all fine except for enum values. They only show as String values. I researched, and found that I need to create a custom binding.xml document. I included it in the pom.xml in the apache cxf plugin.

My custom binding file looks as follows:

<jxb:bindings xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:jxb="http://java.sun.com/xml/ns/jaxb" version="2.1">
    <jxb:bindings wsdlLocation="../wsdl/mywsdl.wsdl">
        <jxb:bindings node="//xsd:element[@name='myEnum']">
                <jxb:typesafeEnumClass name="MyEnum" />
        </jxb:bindings>
    </jxb:bindings>
</jxb:bindings>

The wsdl looks like this:

<WL5G3N0:definitions ...>
     <WL5G3N0:types>
         <xsd:schema ...>
                <xsd:element name="myClass">
                     <xsd:element name="myEnum">
                        <xsd:simpleType>
                            <xsd:restriction base="xs:string">
                                <xsd:enumeration value="EnumVal1"/>
                                <xsd:enumeration value="EnumVal2"/>
                                <xsd:enumeration value="EnumVal3"/>
                                <xsd:enumeration value="EnumVal4"/>
                            </xsd:restriction>
                        </xsd:simpleType>
                    </xsd:element>
....

I get the error: Thrown by JAXB : XPath evaluation of "//xsd:element[@name='myEnum']" results in empty target node at line 4 column 55 of schema file ... bindings.xml

I used an online xpath expression evaluator, and it seems to find the element named "myEnum". What else would I be missing here?

EDIT: the line

< jxb:bindings wsdlLocation="../wsdl/mywsdl.wsdl">

may be wrong since I can change the wsdl filename to something else (knowing it's the wrong filename) and I still get the same error. So how to link the file correctly?