Two trellis nets

So my plants grew kinda tall in veg. I had to wait longer then I would have liked. Anyway so I already have a trellis net up at the moment. I just flipped the plants into flower and there gonna stretch so I need to add a second trellis net. The thing is I've never used a trellis let alone a second.

So my question is do I start to tuck the plants under the second trellis or do I wait for them to grow into the 2nd net?

Note- the one picture with the tape measure shows shows about where the 1st trellis net is


Any tips and or suggestions are greatly appreciated.

Tks for your time