@jphwtx Maybe I misunderstand what you want .....Your downlinks between your MHO-140 and your 6200 are now 10G links and you want to change to change these to more with 25/40 or 100G ?
That's not possible. The 6200 appliances doesn't support higher interfaces then 10G.
Indeed you can use 100G for your uplinks. But based on the datasheet you need a lot of 6200 appliance to get the performance of 100G. I know sometimes are requirements to use higher interface rate for physical links but no need for the real throughput of this.
"a 6200 allows me to configure those ports as interfaces" I think you does not mean the 6200 allows this, it's the SecurityGroup where this interface is configured as uplink. This is allowed but these interface is the uplink between MHO-140 and your local network environment not the downlink.