[planigan]

Jun, I believe you are talking about part 58 (16uf) and 61 (12uf) electrolytic cans. The schematic shows both to chassis gnd and (-) and the positive of 61 to the front side of field coil and the 58 to the rear side (front side being nearest to power xfmer). You can identify the polarity of electrolytic caps that you have by the arrow. The arrow points to the neg on the caps, as a matter of fact they usually alternate the arrow with a "-" sign. I have run into caps that had no arrow and it took me a while to figure out the polarity. If you look at the cans you will see that near the base of most of the caps they are flared out to accomodate the base and then rounded over the base sealing it in place, while the top is not flared.The only terminal(s) come out the base. The can itself is the negative terminal, leads out the base are positive. If you look at the smaller e-caps you will notice an indentation around the cap near one end, thats the base end and +, the other end -. I am assuming that you are going to put the new caps under the chassis rather than stuffing them in the cans. What you have to do is add a ground lug or terminal to the chassis for the neg. leads, unless you can find a ground point close to the caps to hook up to. The reason for the lack of terminals on the mounting nut is that when you tighten the nut that portion of the can crimped over the base comes into contact with the chassis and grounds the can. Also, make sure you disconect all the leads from the old cans, you cant use them as connecting point as the old caps will still be in the circuit.
Pat