I have to say, that is stupid, that the tab just falls off, lol. It should be on the driver'* side, correct?
Or, I could pull the dist. cap off and when the rotor is pointing at the #1 wire, #1 is at TDC. Then, using an object in the #1 cylinder confirm TDC. Maybe easier than pulling the valve cover.
At least a new timing tab is cheap. What kind of labor is it going to take to put a new tab on? Does it bolt to the front cover?