Internal Optional idUnique identifier (ID) of the item to which you want to attach the connector. Note that Frames are not supported at the moment.
Optional positionOptional snapThe side of the item connector should be attached to, the connection point will be placed in the middle of that side. Option auto allows to pick a connection point automatically. Only either position or snapTo parameter is allowed to be set, if neither provided snapTo: auto will be used by default.
The ending point of the connector. If startItem is also provided, endItem.id must be different from startItem.id