If you are using Blocks (not InterfaceBlocks) to Type your Ports just use "manual" feature-by feature direction inversion to achieve type conjugation (and you can even use a ~ tilde prefix)

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Note kind
TIP
UML keywords
Port
TypedElement
TypedElement::type
SysMLv1.x keywords
conjugation
Block
In fact, some SysML users already used the ~ tilde prefix for conjugated types long before the SysML-1.6 ~InterfaceBlock was introduced.
Just don't stereotype your "manual" conjugate as an «~interfaceBlock»!
Relates to
Conjugation in SysML-1.7 is Type-based: InterfaceBlock, ~InterfaceBlock, and DirectedFeature
Related notes
[POLICY] Since SysML-1.6 use of direct UML conjugation of Ports is NOT supported; If you are using InterfaceBlocks use instead a conjugated ~InterfaceBlock type!
[TIP, WORKAROUND]{INFORMATIVE} [HISTORICAL] HOWTO easily "hack" the SysML-1.6 ~InterfaceBlock conjugation and «~interfaceBlock» keywords in MagicDraw/Cameo. [NOW SUPPORTED 2024x Golden]
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