I have installed the control panel for my new SWG just above my timer. I don't have automation, so my plan is to wire it directly to the 220V load on my timer. The left side of my timer box has a spare knockout hole for me to run a new circuit in. My question is, how do I properly run the wire into the box? I saw a thread where someone was criticized for using flexible conduit because you're supposed to leave the power wire exposed and use some sort of special grommet instead, but I'm not sure what that fitting is. Any help?