Here's some pics to show how the ceramic thermoucouple mount works.
These pics are of the mount on my forge.
The mount get's 3 holes drilled in a straight line. 2 outside holes are for the mounting screws that are drilled and tapped 8-32 (IIRC) The center hole will allow the thermocouple with ceramic insulators on to pass through the forge body.
Here's a shot of the one on the Evenheat
The thermocouple can be trimmed to whatever length you want. Use enough of the ceramic insulators to give you the desired length from the mounting block to where you want the tip of the thermocouple to be located inside the oven chamber and take the rest of the insulators off.
Here's a side shot so you can see how the thermocouple wires pass through the center two spots on the mounting block. I left them a little long instead of trimming them down to match the mounting plate.
Here you can see how the tip of the thermocouple sticks out inside the forge. Most of the ceramic insulator is covered in satanite but only the tip part reads the temp.
To mount drill and tap your holes then get the thermocouple to the desired length and connect it to the mounting block. put the thermo through the center hole and put the mounting screws in.
Connect the wires to your PID and your good to go.
Sorry I cant help you out with the element connection as my use here is for a forge instead of an oven.
Take care- Josh