Like I said I bought a cable a foot longer, and I never had a issue with the nuts backing off there is a required torque on those nuts, I have the same plate as you..........

I found my instructions those 4 side bolts and nuts are to be torqued at 100 foot Lbs. and rechecked after you first time out...........

I copied the page you want for yours
http://i15.photobucket.com/albums/a3...enrr/001-1.jpg