marantz volume pot install HELP!!!!!!

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Hello to all.I picked up a replacement 50K dual gang volume pot for my marantz 2325 reciever. The replacement is your typical pot with 2 sets of 3 legs on the bottom. The original one has a 4th leg that wraps around the top & is soldered on to the pot at the 11 oclock position on both pots. I looked at the bottom of the circurt board & it sure looks like the 4th leg is an active circurt. My question to you is do I ignore the 4 leg? Tie it into one of the other legs by using a jumper lead? Any help would be appreciated. thanks, tom south florida.
 
This is what I mean:

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