Thats not really a reccomend location for any Flex implants.
I guess you could probably get away with it parallel with the bone of the index rather than between them as such, but in my opinion, there are better places for them.
Your better bet it from P1 - P4
Save the P0 for a 2in1 xSeries such as the NExT, xMagic or yet to be released NExT2