There is a built in wireframing tool within Miro - have you checked that out? It’s pretty simple but it may be all you might need. It should already be installed if you have a Miro account — https://miro.com/marketplace/wireframes/

Hope this helps! I know it doesn’t directly answer your integration question, but might help with what you need to do wireframe-wise. 

Basalmiq is a more robust tool than Miro is and we often have the need to integrate those workflow diagrams into Miro. Do you have a plugin that allows us to import art boards like the sketch plugin?