[PhilcoPhan1936]

I'm working on a Model 16, code 125. I've got the smaller 4-section filter cap replaced, the black bakelite tubs restuffed, and I'm working on the main filter caps, a dual 91 and 98.
Someone else worked on this and some things were switched around, and replaced.
The Dual 91 can was original. It has 2 connections on the bottom, and was isolated from the chassis with a cardboard ring. The single cap (I'm assuming 98) had been replaced. The black lead was connected to a tab, which was shoved up between the cardboard and the can of 91.
Is this correct?
I'm replacing the dual and single, and putting all 3 in 1 can to simplify things.
The Question is: Do I have the polarity marked correctly? (Highlighted in pink).
According to the schematic, It doesn't look like the 91 can should be isolated from the chassis. Or is my brain fried? 
Any help appreciated.
[Image: https://live.staticflickr.com/65535/4971...e3d5_k.jpg]