The current background URL for ICSdroid is
Can you please expand it to
Background URL? What do you mean?
When you enter ICSdroid you see a field used to enter the ICS URL, right?
That field if pre-filled with "https://example.com/calendar.ics" (it will be removed as soon as you type anything).
I see… but it can only be one line, so only one URL
You can remove it from the field and instead add these two URL's as regular text lines under the field. What do you think about it?