Tvheadend

I have a few IPTV streams that I want to map, however they are currently down so when i try to scan the mux it fails, but because it failed I see no way to map it to a service/channel.

How can I force it to map anyway? yes the stream is currently down, but It will be back up soon, and id like to get my channel numbers all setup at once and not come back and have to add these few channels in one by one later.

Its only 10 streams, so even if there's a way to map them to channels manually that's fine, I think I could handle manually adding 10 channels.