Hood closed with dead battery inside .. and it gets worse

[lurky]

Hi, I posted a few days ago that I managed to close the hood of my 2007 boxster after hooking up a dead battery. Now, the hood release switch in the cabin won't work and the dash doesnt light up at all when I put in the key.
A few people posted reminding me to try charging it using the charging rod in the fuse box, OR remove the front when and pull the hood release cable.
Thanks for the responses..
Yesterday I ran jumper cables from another car to the charging rod in the fuse box, red to the charging rod, black to the unpainted metal hook in the doorjamb. No luck. It didnt work, the dash didn't light up at all and the hood release switch didn't work. I let it sit and charge for 15 mins, no dash lights, still nothing.
I really hoped to avoid taking the tire off because its in a tight garage.. but then I realized that the locking nut is in either the trunk or the frunk, which are both closed. So now Im really screwed.

Hoping for some advice, is there a charging device that I can buy to and hook up to the cigarette lighter? OR what is the process to get a replacement locking lug nut ? Thanks!