Installing driving lights

I've got myself a set of spot lights for my P10 Primera, along with the switch that activates them (got them from another Primera which came out with them from factory).

I found the loom and wired the switch in, it seems to activate the park lights ok.

My only question is, will I need some sort of mounts for the spot lights themselves? I'm about to get someone to cut the holes in the bumper so I can fit them, but I'd like to know beforehand if I can simply bolt them straight in or if I need more parts...