A screwdriver adapter. Forgot, this isn't an N14. I will look for an image and put that up...my bad.Just a bit of advice here. DO NOT use a screwdriver that has magnetic changeable bits. The bit will fall out and go down into the pan. The bit in the pan isn't an issue, the issue is that if the tool DOESN'T make it to the pan and gets lodged behind the cam follower lever. That will cause the cast iron housing to BREAK when the follower is pushed upwards by the cam. use a normal #3 flat blade screwdriver like this...I have one like this here at home and a Snap-On one like this but better at work.
Here's a link,