Im referring the node numbers from the Model of Spring Can with Friction shown in CAESAR II Applications Guide, where friction is applied at node-20.
In your case, node 20 is supported from equipment clip, so IMHO modelling should be in similar way but with addition of Cnode

Node 20, Cnode 30, Restraint +Y, mu = 0.3
Node 20, Cnode 30, Restraint RX, RY, RZ

Node XX to node 30 could be clip from equipment OD.

What others have to say?