Hi,
Thanks for uploading the datasheet. Don't consider my opinion an informed one, please, just want to help if I can.
From your last post, and - if this applies to LFA and LFB - reading what it says in section 6.1, I'd opt for configuration #2 (not connected) "2. Configure the general purpose I/O pin as an input (PTxDDn = 0) with the internal pullup activated (PTxPEn = 1) and leave the pin disconnected."
Figure 66 on page 96 makes it look like when LFEN is disabled it won't interact with anything, if this is so then I assume it won't affect LFA/LFB (which I think are high impedance pins anyway, so not understanding much, don't see how they would draw current if left floating).
Are there no Freescale simulation tools to capture what happens on those pins in different states and connection configurations? Not that that would necessarily give you an accurate answer anyway.
My clueless answer would be to leave them floating - if they are high impedance they won't know the difference between floating and connected anyway, and if floating LFA and LFB have no path through which to drain the battery; or use config. #1 in 6.1 if you see mistakes in my reasoning.