Luggage compartment does not open

Hello Jaguar friends, I have a question for you, since I have a more or less big problem here with my Jaguar. I am sitting here in Sultanate Oman and I bought a used Jaguar Sovereign ́96 last year. Now I was on Germany holiday a few weeks and the battery is empty. So far so good and not so bad. Actually! The nice Japan import does not allow me to put the key in the intended opening to dre At the front, everything is no problem. The hood can be opened accordingly. Unfortunately, I can’t connect a bridge cable there to give juice again to everything, then open the trunk “normal” via the button in the back. Is there any way to open the trunk somewhere else, or maybe to get to the battery cable in the interior so that I can get juice back on the cart? Thank you for your answers.