For this delay tap sampling example , the components you are looking for are the power splitter and the electrical delay.
The power splitter can be found under default/passives library/electrical/splitters and the electrical delay can be found under Default/Tools Library/. The value of loss for the splitter can be set to 3 db by double clicking on the power splitter and putting in that value. For the electrical delay you can adjust the delay to the desired value once you double click on the block
I’m glad I was of help for your previous question. To generate the histogram you will need to connect an eye diagram analyzer. In the eye diagram analyzer you will need to select the region and then calculate the histogram. If you click on the eye diagram analyzer and then click on the help icon that i circled in the picture, the documentation for the eye diagram analyzer will come up. in the documentation you can read up on how to select the regions for analysis.