(Shared) Terminal points, Examples requested

The little stuff is easy. For large gage leads (2, 4, etc.) that share a terminal point but route in different directions, what is the most professional looking way to safely insulate them and maintain a professional looking installation? I can make a safe connection by mod'ing something off-the-shelf. If there are boots that afford flexibility in their design, I haven't found them. Ideas, examples, pictures would be appreciated. Thx.

Silicone fusion tape works well for this. I think it looks better than cutting the silicone boots trying to make them fit. I have previously cut and pieced the silicone boots to fit, then add some silicone sealant to keep them in place.