Originally Posted by
eshew
Remove the cable port screw (black with a slot for a Philips head) .
That would incorrect Shimano would use JIS screws, but in the end everything has moved to Cross Tip which is compatible with both (like JIS) but is the new international standard and simplifies things. However Phillips is always incorrect with Shimano derailleurs. Easy to cam out and ruin those little screws. The Park Tool DSD-2 is my favored screwdriver these days as it is Cross Tip and really nice feel but I have used Vessel in the past and have one kicking around somewhere.