I knew things were about to get messy so I put on some rubber gloves. I worked it by myself but was getting nowhere then a female sales associate joined me. The two of us grunted, writhed, and struggled but could not get it in despite having used excessive lubricant on the rubber. The tip got messy and we had to stop to clean it. Then it occurred to me to put some lubricant on my finger, insert it in the opening, and rub it around the inside edges. After that it slipped in with ease and I explained, "It just wasn’t enough lube. You had to use more lube." I gave it three screws and was finished. Btw, the headlight on the van is working now.
Because now I don’t need to look up the torque settings. I’ll be in the driveway for the next hour or two.