In general, the procedure for registering for the immigration e-gates upon arriving in Malaysia is simple; however, I'm not sure about the particular countries. At the designated registration counter, you will normally be required to present your biometric information and any pertinent travel documents. Using the e-gates for immigration clearance can greatly speed up the process once registered. That being said, it's a good idea to inquire about the most recent developments and experiences with e-gate registration from other travelers or the Malaysian immigration authorities.