I described this process in an earlier thread, but can't find it now.
You can remove the viewfinder by unscrewing the toothed lock ring that connects the viewfinder to the body (which also controls how easy it is to move the viewfinder at that joint).
Under the ring on the dumb side of the camera there is an allen screw which is locked with a little slotted lock nut. You need to undo that lock nut by a half turn (using a two prong driver or similar tool) and then by turning the allen screw with a 2mm allen key you will see the large toothed lock ring undoing. (The allen screw is actually a worm gear that turns the toothed viewfinder lock ring). Once the ring is loose, you can remove the viewfinder. Watch for the teflon slip disc inside.
When putting the viewfinder back on, tighten the ring until the viewfinder elbow is firm but can be shifted if you need to adjust the angle. Then lock the allen screw with the small lock nut.
For transport I would cover the exposed optical surfaces with some lens tissue taped on.