Use tape at your discretion. The emulsion would be face down on the glass so the tape would only contact the base.
If you don't think you need it, don't use it. If you do need it use drafting tape or Permatex or similar. I suppose painter's tape would work in a pinch.
I wouldn't use Scotch tape or ordinary masking tape.
The way I drew it was just for purpose of illustration. Locate the tape where you think it best. Maybe only on the edges.
I've done it on the Beseler a couple of times. No problem there. Just close the gate slowly.
I've only tested it on the Omega. I seriously cringed as I lowered the lamp onto the glass... slowly... but it does work. Just be damn careful!
Just thought of this: Maybe, you could use a donut of cardboard or poster board between the top sheet of glass and the lamp/condenser to act as padding.