Short Shifter...
The best way to describe this - is to understand that the Fiestas IB5 transmission has a pre-set and configured shifter ARM that takes your effort and translates it into a force that can push against the linkage and a shifter fork, engaging the gear and using opposite force - disengage it.
So to do this requires you to know how Billet and gimbal setups - when their configurations are changed - you have to keep your wits about you and understand the changes. You can try to do this on an IB5 - but the best efforts and even a conversion kit - is possible for the B6 (6-speed) transmission and all it's headaches associated with that conversion for your car.
It's why the H in the shifter configuration is taller (height is greater - as in length of throw) is longer - so you can translate that effort into distance which then makes the system take the distance and translate it into a higher-value of torque for a smaller distance of throw at the gear and it's shifter fork.
When you make it (your throw distance by changing the placement of the gimbal to stud location on the pivot arm) shorter - like shorter shifting - the distance you throw the lever is less, so the effort you have to apply is greater - but does not change the distance the fork needs to move the gear in order to make the engagement.
So there is a PDF that helps describe what I'm talking about - for you will have to take your larger arm shifter in the gearbox where the Gimbals are connected - and reposition that gimbals' stud Closer to the central pivot to gain the shorter shift pattern and make the quicker throw possible (quicker is relative - for less distance traveled -- you have to apply more torque to your effort to shift the gears).
The conversion for the IB6 tranny takes the OEM stud out for the ENGAGEMENT portion of the gear, or the Height of the "H" is different (that longer throw - is shortened) and places a billet stud into the place and offsets it closer to the central rotation pivot by 11.7mm in Radius distance - it's closer to the pivot so the shifter itself will use the gimbal and stud differently for ALL gears involved.
PDF is attached...
TO ADD, went looking found this - it is a conversion kit for "short shifter" on the Fiesta - 5-speed version - so it does change the shifter inside the vehicle - so in a way - this conversion is working at the Drivers side, not the transmission side as I discuss above. Instead it changes the LENGTH of throw the cables take on - when you use a shifter assembly that uses less throw (shorter stick too) so this places the "accuracy" issue onto the Drivers position - not the transmission side and it's changing position on the motor mounts which are not supposed to change the cables but add a level of dynamic effort translation that it does affect when the motor mounts flex to a greater degree.
So found this PDF - also attached M-7210-FA...