hello Rbrown77, welcome to our group. I would suggest you check the hydraulic fluid level, it is likely low since you removed and replace those cylinders. keep us posted
Here is an electrical schematic for 753 with BOSS option. However it starts with SN 512716001 and was printed in October 2000 so it may not match your machine perfectly
I also had to replace my right side handle due to a corroded switch. New one shown in this photo.
Now that I’m looking at my machine to take these photos for you, I remember that the old one that I removed had loose wires Also. Are you loose wires simply cut or do they have weatherpack terminals...
I just read through your original post. are you having a problem, or are you just concerned about a disconnected cable? I ask because many of these machines use a universal harness, and some functions are optional, based on how the customer ordered the new machine. My 753 has multiple connectors...
it looks like your serial number predates the schematics in the manual i just uploaded, but it should be close to what you have. attached is a screenshot of the drawing legend / title block.