jeep wrangler - where attach safety cables??

I'm prepping to flat-tow my 2015 Wrangler Rubicon JKU. I want to attach my coiled safety cables to the frame rails, but the jeep has an aftermarket front bumper, and no "slot" or other anchor point in the side of frame rails.

I'm looking for suggestions, experience, wisdom with this. Is it possible to add an anchor point somewhere - other than the bumper?

I suppose I could install anchors on the bumper, but that kinda defeats the purpose of the safety cables if its the bumper that fails.

thanks!