A really stupid servo question

I am building a toy that I want the right arm to be raised 90 degrees to look like it’s pointing at you, then pause for a few seconds, then go back down to it’s normal resting position. I know I have to use a servo but how can I connect the arm to the servo? Do I have to just put a screw through the shoulder and into the servo’s shaft?

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Thanks. I really appreciate the help :D.

submitted by /u/SantaOMG
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