Demonstration on inserting a SIM card in a Penguin J3 laptop (applies to at least the Penguin J3 GNU/Linux Laptop TPE-PENJ3LAP)
How replace the battery of a J3 model laptop
Troubleshooting 4G modem on Penguin J3 laptop (includes pictures on how to orient SIM card during insertion, TPE-PENJ3LAP)