I have a 1957 Kenmore that looks a lot like yours, only my model # is much lower. You have 2 thread spool spindles so you may beable to use double needle. The thread goes from spindle to thread guide, then wind thread around tension (round) guide. Thread through take up lever right to left, then to needle (front to back). There may be a thread guide just above the needle. The metal door may be the opening for decorative stitching cams and the white wheel below the metal door is for adjustments for straight, zigzag and which side of the cam you want to stitch. There are 2 sides to each cam. For bobbin winding, put thread spool on spindle (on machine base below wheel), thread through thread guide (behind feeddog lever), front (bottom) to back (top). Start thread on bobbin, then put bobbin on holder in front of wheel. Push bobbin holder against wheel. There is a wheel in the middle of your machine wheel where the belt is, turn it towards you to loosen and this lets the bobbin wind without the machine sewing. Tighten again before trying to sew. Go on-line to Sears (if you haven't already) and look up your machine model. They may have your manual in their parts inventory. Hope this helps.