Im more of a LAD programming PLC person,
OK, so what you are doing now is the equivalent of hard coding values inside an AOI, assuming you deal with RA and AOIs. You just don't do it. They aren't reusable anymore.
Clicking on a bar in the first place isn't common, it's not intuitive. Most operators will not think to click there, especially to click on separate sides. It would be better to simply place two buttons, then it's obvious.
However, if you want to the functionality...
You have properties for KeypadText & PLCAddressKeypad. You basically need to create two more and relabel the existing ones. So, something like, KeypadTextRight, KeypadTextLeft, PLCAddressKeypadRight, PLCAddressKeypadLeft. Now your control is resuable.