I'm upgrading my Shimano 105 5800 shifters to newer 7020 shifters in order to equip my bike with hydraulic brakes. I'm not changing any other components as part of this upgrade. The kit shipped with the necessary cables but without inline barrel adjusters. I did some reading and the 7000 front derailleur has "integrated cable tension adjustment" so it appears that it doesn't need barrel adjusters. I am not sure if the derailleur manages this on its own, or is a combination of shifter + derailleur, etc.
Considering I will continue using my existing derailleur, I want to confirm that I should cut the new cable housings and add my old barrel adjusters to this setup.