Blackstar Emulated Out Hookup

Hello I have an AB 1818VSL and I want to record a Blackstar HT Club amp using it's emulated out. It is supposed to be line level, a 1/4 trs jack on the amp and can be used for headphones, but apparently you can hook it directly to recording interfaces. On my 1818, would I be able to run a 1/4 TRS to 1/4 TRS to inputs 3-8 without any problems? If not, what types of options do I have to do this?

Thanks for the help.