Embedded plate qualification - clarification

Sir, 

The work is on the qualification of the snubber support embedded plate(EP)
The snubber is connected to the EP in the concrete wall. One of my requirements for the EP qualification is the loads on the EP
Kindly see the attachment for the sketch.
Available load:
self-weight of snubber
loads coming on snubber in OBE & SSE condition.
Now for the EP seismic qualification, how shall we take the reaction loads on the EP?
i.e) Fx, Fy , Fz , Mx. My & Mz