If you have no way of measuring the current draw you cannot assume it is that killing your battery. Often when a sick battery exhibits symptoms of a quick run down it is just having problems internally and any small draw can make them act really strange. A load test and hydrometer will tell the tale in a couple of minutes.
Keep in mind that we do not BUY batteries, we rent them. Even new ones can be bad. So my suggestion is to NOT keep fixing wires and plugs until you have solid concrete information. If you poke around trying to fix the issue I can almost guarantee you will install more problems.
A healthy battery should not run down in a matter of hours. If it does you will have something hot or melting or worse.
It can be confusing and distracting with fuses blow etc but I think it is time to get back to the real problem now.
Ok, off my soap box. Have fun.
