Cisco 6500 VSS Configuration Example

I’m sure I’m missing something here but if I were to use VSS on 2 layer 3 4500 chassis and wanted to connect a access switch to the VSS pair would I use a regular port channel to connect to the VSS pair from the access switch or is there an actual multi-chassis Ethernet port configuration I would need to configure between the access switch and the VSS pair? I’m just a bit confused as to what configuration I need to connect multiple access layer switches to the VSS pair. I’ve been trying to research it but am pretty confused about the topic as I’m not able to see a straight forward answer. Any clarification would be helpful.