Chatting to your Connection's partner is easy; the person you've Connected with just needs to make a group chat between the three of you.
If you still really want to Connect, though, you can do the following while we work on adding that feature:
Go to your Feeld profile (click on the human symbol in the bottom-right corner).
Select 'Share my profile'.
Tap 'Copy' to copy the link.
Open the group chat in question.
Share the link and ask the the person you wish to Connect with to do the same.
Open the links and 'like' each other's profiles.