I removed the manual safety from my M&P and have received the "plugs" from S&W to place into the open holes where the safety came out. I received part #'s 39246 (LF) and 39247 (RT). Here's my issue. The parts don't look the same and what's marked 39246 (LF) actually fits on the right side (barrell facing away) rather than the left side. And the part marked for the RT side (39247) is totally different looking and I can't figure out who it's supposed to fit into the frame. Can anyone help with a video or diagram?
Much thanks,
Ray

Hope this helps:

M&P Thumb Safety - YouTube

S&W M&P45 Ext. Safety Removal - YouTube

Thanks Rangel. I've actually watched the video on the 45 safety removal. In fact I watched that in order to take mine out. Unfortunately neither video answers my question about putting in the plugs I got from S&W.
Again thanks.

Having the same problem here...anyone got a vid on how to INSTALL the frame plugs that fill the thumb safety holes?

When i got mine the one that faces the right side is the one that has like a L shape (right side being gun facing away from you/ serial number side) and tye smaller one on the left side. I watched that video with the 45 and to others that do a full dissasembly and jumped to the part of the safety. Its fairly easy to do, tye tricky part for me was putting the housing back in half way then sliding in the plugs and after that puting it all the way. Does no require much force.