>> why are those configuration files located on a VMFS datastore when they are needed inside the guest?
Guests ( many numbers ) will be installed with an automated process - single ova - hence I cannot bundle the configuration file inside the guest. Hence I create the config file outside and make it accessible for guest.
>> Why not create a NFS-Server and store the files there?
Yes this is one option. But if I can do things with vmware infrastrucutre component, I don't need to insist customer to have one more nfs server hosted.