Distribute connectors vertically and horizontally
When you manually insert extra connectors, you have to eyeball it and then don't have an option to distribute them evenly, e.g. I have three lines to come out of a rectangular shape. It only has one connector in the middle. I drop one either side of it, I have no way to space them at quarter points. When I select them all, the distribute options are greyed out.
use vertical and horizontal spacing option in Visio. you have to ctrl and hold all connectors and then space them evenly using this.