[klondike98]

I think what you are asking is: "can the negative lead of electrolytic caps 45 and 46 be connected together?" Yes, they can. The exterior of the capacitor cans of 45 & 46 was originally the negative lead, thus the use of the little metal connection lug that was held between the capacitor can and the insulating cardboard sleeve so that wires could be soldered to it. The cardboard sleeve isolates the negative leads from the chassis which is at ground potential ( 0v). The two negative leads from caps 45 & 46 connect to the center tap of the transformer and as Radioroslyn notes are at a negative potential with respect to chassis ground. This is the most negative point in the radio and is commonly labelled as B-.
Hope that helps.