I would recommend getting some heavier duty straps that have chain ends http://www.truckntow.com/cargo-control/ratchet-strap-components/2-winch-straps-w-chain-anchors.html with ratchets that have chain ends as well http://www.truckntow.com/cargo-control/ratchet-strap-components/vulcan-proseries-ratchet-short-end-with-chain-anchor.html
also you should run the straps around your jeep's axles in a criss cross pattern, thats a much better securement point