I know exactly why they did this as I'm doing something similar on my modified car.
The L to which the spring is attached on the latch is probably for the optional interior lever style trunk release.
If you use a bowden cable that is attached to either a lever, like the optional interior lever style, or a pull solenoid you have the issue of stretching/breaking the cable or pulling the cable through its mounting clip. This is because it's hard to figure out how to build a stop or adjust the cable length just short of when the latch stop comes into play. If you don't build in a cable stop you will continue to pull on the L shaped pull built into the trunk latch, bending it, breaking the cable or pulling the cable sheath loose from its mount.
Instead, you could opt for an inline spring so that as the trunk latch hits the built in latch stop the spring will stretch instead of breaking or bending things.
I'm using a 40 pound pull solenoid so I had to design a very accurate way of adjusting things to prevent damage.