The battery should be removed from the pod.
Could you sit on a battery? Like, remove the seat. That's useless anyway.
Look around. Any tools that could help you?
There is a wrench next to the harpoon. Go grab it and unscrew the seat.
Hmm... yes. Maybe sitting on the plain battery is little off-putting. If you could cover the battery with something. Something you could sit on.
Here's an (actual) hint. The front door at Tori's apartment is now open.
You see the mailbox, right? It is screwed thight.
Unscrew the mailbox in front of Tori's apartment with the wrench.
Yes, the mailbox can act as a seat. Go and attach it to the base plate and stick the battery into the mailbox.
You pod is ready to launch!