If you own a '97 Boxster (or a year that
does not have the red jumper attachment on the fuse box), here is easiest way to open frunk without having to remove parts to get to the mechanical cable pull:
1) Make a small jumper using insulated 12 gauge solid copper wire. Strip 1/2 inch insulation and use a hammer to flatten both ends to fit into fuse location (about 1/8 inch wide). Also strip about 1 inch insulation in the middle. Bend the jumper into a U-shape. (see photo)
2) Remove C3 fuse (Row C - 3rd row down, 3rd fuse over from left, s/b
15 amp - Function is "Control unit for central locking system, alarm system")
3) Insert both flat ends of wire jumper into now vacant 15A fuse ports, one in each fuse "receiver".
4) Connect 12V source to bare center strip on wire jumper
5) Turn key in driver side door lock a few times open and close. Frunk (and trunk) levers next to driver seat should now open the enclosures.
6) Disconnect temporary items, reinstall fuse, and access battery for charge.
Hope this helps someone