Trying to figure out the negative and positive cable?

I decided to tune up my car listed above that's been in storage for 10 years get it running. The vehicle has been long remove, so I went and purchase a brand new one.

I can't remember which cables (positive and negative) to connect to their proper battery post.

So, I need assistance with figuring out which is the positive and negative battery cable before I place them on the battery post.

The cables aren't marked with the usual (black/ negative and red/positive indicators).

I hardly know anything about old cars or cars in general for that matter, so, yes, this is pretty sad, but true.

Anyway, one of the cables seems to be connected to what looks like the starter. I'm guessing this is the positive cable? Or not?

I don't want to take an educated guess on this one, I'll rather asked the dumb question and be safe than sorry.

I forgot to take a photo or video of the under carriage, so as to view my situation up close and personal, but I will my next post.

Any and all help will is needed. Thanks community!