After conducting research, it appears that the boat ramp named Enders main area South is located at Enders Reservoir State Recreation Area in southwest Nebraska. This boat ramp is designated for motorized boats and is the main access point to Enders Reservoir.

The width of the boat ramp is not readily available online, but it can accommodate larger boats and trailers. The Enders Reservoir itself is a large body of water spanning over 1,700 acres with a maximum depth of 44 feet. It is a popular destination for recreational boating, fishing, and camping.

According to the Nebraska Game and Parks Commission website, all types of boats are permitted on Enders Reservoir, including jet skis, pontoons, and fishing boats. However, it is important to note that all boats must comply with state and federal boating regulations, including the use of life jackets and proper boat registration.

In conclusion, the boat ramp named Enders main area South is a motorized boat ramp located at Enders Reservoir State Recreation Area in Nebraska, which services a large body of water that allows all types of boats. While the width of the ramp is not readily available, it can accommodate larger boats and trailers.