Who knows. Some probing with a scope can be used to find the sync pins. Information is scare: https://www.google.com/search?q=Video+Mac+PAC&btnG=Search+Books&tbm=bks&tbo=1#q=%22Computer+Care%22+Video+Mac+PAC&tbm=bks

Says its based on the Lapis DisplayServe, which appears to have been a NuBus video card. None of them used that type of video port though. Hopefully the driver/software is on the machine and can be retrieved!