A connector system is configured to fluidly connect a nasogastric tube assembly including a lumen and a tube to a medical device. The system includes a connector including: a fitting configured to provide a fluid-tight connection with the medical device; a neck coupled to the fitting, the neck configured to attach to the nasogastric tube assembly; and a body coupled to the neck, the body configured to provide a fluid-tight connection with the nasogastric tube assembly when at least partially inserted within the lumen; and a first tether including a first fastening region defining a first opening configured to receive the neck, a second fastening region defining a second opening configured to couple to the nasogastric tube assembly, and a link coupling the first fastening region to the second fastening region, the link configured to maintain a fixed distance separating the first fastening region from the second fastening region.