While I was looking up the correct door gasket to order, I found a basic Manuel for older Englander stoves (1980’s). In reading I learned there are two oil ports on the blower which need to be oiled annually...oops...to my knowledge they have never been oiled. I lost my husband in March so I can’t ask him to be certain but ...I’m pretty confident they have not been. The sketch manual states only that there are two ports...no indication or diagram of where they might be. I’ve looked but nothing is jumping out at me as an obvious oil port. I’ve attached a photo in hopes someone can guide me. I have 3 in 1 oil but have no idea where it goes. Stove Model is 28DDS H/M .