Here you are Chris. In detail.
M.C.A. Hydraulic Cable Lubricator. Had it for 50 something years, so don't ask where I got it. Certainly NOT on line.
Slight boo boo here. Cable, washers and seal go in the other end.
This shows cable inserted from the left.
You inert the cable etc as shown. Fill with oil then fit the other end and screw the T handle in and that forces oil through the cable.