I have an R10 Custom character and have the humanoid set to R6, since there are only R6 and R15 options. How can I set the holding part to what would be the RightLowerArm instead of just RightArm? I don't know where the script is that is responsible for tools.
The script that manages tool welding to the player is within ROBLOX's servers, so we don't really have access to it. However, we do know how it works. It moves the tool's handle to the player and welds it there (Also "welds" the player's hand), though I've never check the player for a Tool Weld..But that is probably how it works. All you need to do is replicate this process, just change the move location, and the weld of the arm. If you need help, just comment and I will edit my answer to help you.