On the 16.0.2 you have line level 1/4" jack inputs and line level jack and XLR outputs. These are the correct type and level to connect to the Aphex 240 but none of them work as inserts.
If you want to use the compressor over input sources such as vocals then you'll need to connect it to the line input of one or more channels on the mixer. However, ideally you'll need to use an external mic preamp to connect into the Aphex to get get your source signal in.
Alternatively you could connect your Main / Monitor / Aux outputs from the 16.0.2 into the Aphex 240 but you'd need to decide where you wanted the signal to go from there.