Hi Arnel,
Have a look at https://spservices.codeplex.com/wikipage?title=$().SPServices.SPDisplayRelatedInfo&referringTitle=Documentation - I think there is an example of how to use SPDisplayRelatedInfo at the bottom of this page?
Have a look at https://spservices.codeplex.com/wikipage?title=$().SPServices.SPDisplayRelatedInfo&referringTitle=Documentation - I think there is an example of how to use SPDisplayRelatedInfo at the bottom of this page?