Go to the E_Sockets and click the New button and name the new entry Third Person Left Elbow and save, it should look like the image below.

Then go to the BP_SGKMasterCharacter and copy the videos below.

Next go to the BP_MasterHoldable and copy the video below.

Next go to the BP_ThirdPerson_Anim and create a variable called LeftElbowOffset and set its type to Vector. Then copy the video below.

Add the highlighted nodes shown in the image below, location at the top of the image.

Next go to the BP_FirstPerson_Anim and create a variable called LeftElbowOffset and set its type to Vector. Then copy the video below.

Add the highlighted nodes shown in the image below, location at the top of the image.