That's it, but you'll probably have to remove it, put it in a bench-vise & hit it with some LiquidWrench or PB Blaster to break it loose.....doesn't look like it's turned in a while.
One side will be RH thread & one side LH, if there like car brakes, so don't mix them up.
ST
One side will be RH thread & one side LH, if there like car brakes, so don't mix them up.
ST