Product review (5 stars): Installation for Dummies
Here is how I approached the installation:
1.  First of all, if the oven is turned off, there is no need to shut off power to the oven outlet.
2.  If you are careful, the removal and replacement can be done entirely from within the oven, without pulling it out to expose the back.
3.  When step #2 is being executed, there is a chance that one or both of the connecting wires will drop back behind the oven wall.
4.  If that happens, one can get a coat-hanger, bend it into a hook, and attempt to fish the wire back into the oven cavity.
5.  It turns out that even with the oven turned off, there is a hot terminal within reach of the said coat-hanger hook.
6.  When coat-hanger hook contacts hot terminal, step #1 becomes a moot point if you are lucky enough that the circuit breaker pops.
7.  If you are not so lucky, your family and/or friends will find you dead with your head stuck into the cavity of an ELECTRIC oven.

Or you can bypass the above steps, cut power to the oven, pull it out from the wall, remove the back panel, and do it the right way.  Aside from my self-inflicted foolishness, the replacement element fit and works great.