WarehouseTransfer IWTTransportChainsIndex

We have WarehouseTransferLink table which merely links two warehouses together (saying which one is From, which one is To and is the link is active). The actual transport parameters are stored in table WarehouseTraqnsferTransport. Each record in the WarehouseTraqnsferTransport table needs to be linked to a record in the WarehouseTransferLink. Now the + button on the index page merely creates a record in the WarehouseTransferLink to which you then need to add actual transports. The confusion here is that the index grid shows combined data from both tables whilst the + button can only add to one of them (WarehouseTransferLink) and the other one (WarehouseTraqnsferTransport) needs to be populated from the edit page