Your company recently acquired another company that also has its infrastructure hosted in Google Cloud. Both companies currently maintain separate Google Cloud organizations. For network connectivity, each organization uses its own Shared Virtual Private Cloud (VPC). However, some of the subnets within these VPCs overlap. To integrate the two businesses, you need to establish private network connectivity between their applications, which are located on non-overlapping subnets. What solution would you choose to achieve this integration with minimal re-engineering of the existing infrastructure?