Hi Daox, The bottom picture is the heating pad for the transmission. The pad is either 2"x5" or 2"x7", I can't remember for sure. It was the only size I could find that would fit without going over any "bumps" on the underside of the transmission. It is 100 watts and I got it from Amazon. I don't think you could get a 4" x 5" pad to work on the trans.
The top picture is a 4"x 5" pad on the bottom of the oil pad. In order to not have any "bumps" to go over on the bottom of the oil pan I "shaved" two of the ridges level with an orbital sander with 100 grit sandpaper. (No oil leaks after 1 year
) This pad is 250 watts.
These two pads are able to get the oil temp to 180 degrees within 2 hours, but my car is parked in and insulated but not heated garage that rarely gets below 50 degrees. You may want higher watts for the oil pan heater pad.
Hope this helps.