Heckblende fitting

Hi, Any way of fitting a heckblende without drilling the 3 holes? Mark carter said he'd seen someone do it without drilling, any idea how it was done?
Plus any tips on the fitting of the heckblende? Wheres best to rig up the new number plate light wireing, would i just solder the new wires to the existing number plate wires (lighting up heckblende) when the lights are turnt on would it be enough power to light up the heckblende and numberplate lights if i did this?

thanks.