How to link two or more install base assets in Fusion?

We know that an asset can be linked to its components through parent child relationship and establish a hierarchy. However, we have a requirement to link two assets at the same level in IB. For ex. if asset A is parent with components A1, A2, A3 and asset B is a parent with components B1,B2,B3 then we want to establish a relationship between A and B assets. How can we achieve this IB Fusion?

Thanks,