From OpenSCADAWiki
To do this we will open the frame of the mnemonic scheme "AT 101" for editing, grab our complex element by the "mouse" and drag to the mnemonic scheme, where we drop it in the desired position — enter the identifiers AT101_1 and AT101_2, respectively. Place the added items as convenient to us. After performing these manipulations we must get the mnemonic scheme with a look in Figure 5.3.3.1.