Here is a simple bracket I designed for holding scale tow ropes on to your RC crawler (or whatever you wish to put them on).

The backing plate has been designed to allow standard 4" zip-ties to slide under it, which makes this backing plate useful for securing wires and such on the inside of your body.

The screw holes are designed for standard 3mm hardware, and are tight by design.

Support material is required, and recommend using a raft to print the backing plate. One design "flaw" is that the support material is difficult to remove from middle of the bracket.

This was designed on Fusion 360.