450m When to hardcode sfp speed?

I've got a pair of 450m's that I was recently trying to connect to a Dell s4048. I forced the speed on the dell side as these are all 10gb ports, it seemed to link, but I wasn't getting any traffic.

Is this a case where I should specify 1000fx on the AP? 1gb optic on the dell side, it works in a palo alto which doesn't have sfp+ ports.

The cnMedusa (450m) SFP port is SFP, not SFP+.  It supports 1 Gbps optical SFP modules. I am not sure how to configure the other end of the fiber...