How to fix security camera to eave?

Monument

Hi,

I have purchased a Wireless security camera that I would like to place under the eave outside my Garage. The Camera has a short piggy-tail power cord and then a longer cable to join to it with an adaptor/plug.

While I can mount it to the eave and put the cable through I'm afraid roof spaces are a complete mystery to me. So my question is, how do I access the short power cable from the camera inside the eave to join it to the long power cable so that I can introduce that into the Garage and plug it into a power point?

I'm not keen on getting up into the roof space as we have a steel frame roof and tradies in the past have been nervous about the frame holding their weight. In addition, I think it would be a difficult spot to access.

So I am hoping there is a method that is a shortcut for accessing the Camera power cord to bring it into the Garage.

Thanks very much for any help.