[the picker]

As for the battery I am not sure. The minus goes to pin3 which is the grid.
In your case I cannot tell as you have some octal tube in that socket.

It is actually a bit hard to look at photos without knowing what's what and try to extrapolate it to what it is.

going back to the battery the two original connection points were pin 6 of tube 6k7 and a terminal lug that has a .1 mfd cap that goes to ground a blk wire that goes to a if transformer a white wire that goes to tube 6u5 and another white wire going to a terminal lug that goes on to connect to the band selector so which is positive and negative