I misread the OP issue. Here is the look for the trunk latch + actuator. If you look at how the emergency cable runs through to the latch, you can see that it should not be that difficult to free the latch. It sounds like the hook is stuck if you can hear latch actuator engage.
The pictures were provided from Part Society from this link I google.
https://www.partssociety.com/products/03-boxster-s-rwd-porsche-986-rear-trunk-latch-actuator-98651205302-66-919
