Lol. How to get a wrench out of the firewall?

[Crank]

Okay, so I was trying to break the nut loose on the back of the wiper motor, well it happened to pop loose and drop to the bottom on of the inside of the firewall. I dont know of a way to get anything out. Is there a drainhole in the firewall? or an access hole to where I can get it. I tried using a long magnet to get it but it just stuck to everywhere leading down to the bottom and then broke. Kinda thought about getting one of those little flexible grabber things... Any help would be appreciated. Thanks
Brandon