I decided to add in-line outlets to the existing TV power cord. That is what this Instructable describes.
NO, the intro photo does not show what we have in our house, but it does make a point.
Step 1: Buy the end-of-line outlet type connector.
There are many of these, meant to just clip over the end of a standard 18 gauge double strand cord. You lay the cord into a groove in the outlet, then clamp the connector closed; there are prongs that penetrate the cords to make the connections.
I bought one, thinking I could modify it to meet my needs.
Step 2: Modify outlet for in-line use
The outlet I bought was only for end-of-cord use, there was no way for the cord to continue through the outlet.
I created an opening for the cord to pass through by cutting away a portion of the hinge. Photos here show before and after.