This is a picture of the front connection. The bolts in the picture are mounted into the flange. You will need to turn off the nuts which are not seen in the picture. Use a 13 mm deep socket and lots of PB Blaster. If the bolts are ruined by corrosion, you may have to grind them off, drill them out and replace them. Don’t bother trying to turn the bolt heads; they will not turn.