This is a picture of our rear bath '66 TW just before I pulled it to replace the black tank. The toilet has been replaced. The plumbing is in place for a vacuum breaker and sprayer which isn't present in ours either. I turned off the valve to the VB and non existant sprayer. I found that they really aren't necessary for us. The shower hand sprayer does the same chore.
Neil and Lynn Holman
Kirk Creek, Big Sur, Ca. coast.
1966 Trade Wind
1971 Buick Centurion convertible
1969 Oldsmobile Ninety Eight