How to submit a Webflow form into the CMS with Multi-Reference fields

Grab the welcome page code:

<script>
var Webflow = Webflow || [];
Webflow.push(function() {
  MemberStack.onReady.then(function(member) {
   if(member.memberPage){
    window.location.replace("/");
   }else{
   	setTimeout(function() { location.reload(true); }, 3000);
   }
	})
});
</script>