cq18t -20db pad

I need help with how to activate the -20db Pad on the cq18t mixer. The specifications say that the line inputs (combi sockets) have -20dB Pad (Fixed).

Is this already active? How do I activate?

The 1/4 inch input on the combo jacks is pre set with a 20db pad.

Thanks. So if I use the 1/4 inch input I get the -20db. If I use an xlr cable into the combo jack I do not get the -20db?

I am wondering as I am looking to run the main output of another mixer into the cq18t and don’t want to overload the inputs. The other mixers main out is XLR.