Abstract: Travel trailer and motor home users must periodically use various facilities for filling motor fuel tanks and water storage tanks of their vehicles, as well as dumping their waste water and sewerage receptacles. Typically the fill or discharge receptacles for these different tanks are located at different locations along the length of the vehicle, making it difficult to align the vehicle with the different service facilities. The present invention comprises a device whereby a driver can accurately line up fill and discharge receptacles with the corresponding service at a service station or dump station without the aid of a second person or the need for leaving the vehicle.