The window to apply for Orient Green Power Rights Issue closed on - September 13, 2024. However please be informed that you can apply for Rights issue from your internet banking platform ASBA mode, similar to the way you apply for IPOs.
As every bank would have a different interface, hence the steps involved will also differ. Hence it is recommended to reach your bank’s customer support to get the step-by-step guide.
You can also check the brief process in this post