Accessory mount- ground wire stack?

[geo5]

I am mounting a winch cutoff switch on owl expedition accessory mount (photo from OE website)

The bolt circled above image is currently home to 3 ground wires- 2 diff lockers and the stock engine hook to fender wire.

My question is am I ok stacking/sandwiching 3 ground wires and the accessory mount all using same bolt? Will grounding still be effective?

 

[Trunk Monkey]

As long as all the metal surfaces are clean, yes.

 

[geo5]

As long as all the metal surfaces are clean, yes.

Cool thx Mod.