getting reddy to skin the hatch lid and......

I want to put some backing in to mount the gas lifting struts,
How far(in general) from the hinge towards the back does the average strut mount? I want something solid under the interior skin to bolt the gas strut to.
Thanks ! Aaron
How far(in general) from the hinge towards the back does the average strut mount? I want something solid under the interior skin to bolt the gas strut to.
Thanks ! Aaron