I just soldered extension wires onto the fuse clips and ran them to a new fuse block that I mounted on the package tray to the left of the steering column.
I was willing to clip my wires from the back of the fuse block after I had marked them to keep track of where they go and then strip all the ends and hook them up to a modern atc fuse block that has screw terminals, basically how someone attaches wire to something like a household wall switch or outlet.
And if you don't want to crimp or solder the extension wires: https://www.ebay.com/itm/BEST-WIRE-...m3f50c478b6:m:mKn1dCm96d5gijFiqYaPdlA&vxp=mtr
Not personally, I always solder and heat shrink my connections, but I know a lot of the stereo installation shops are using them because they save so much time. I'm gonna get some just to keep in my tool box in case of emergency.
Or , if you have the room and don't need a butt connection or need to connect several wires, the Posi-Twist are little less expensive: https://www.ebay.com/itm/Posi-twist...uNW2N~9:sc:USPSFirstClass!17406!US!-1&vxp=mtr
Here is what I suggest you do, until you get all the other issues sorted out (leaking cowl/bad floorboard): 1. Remove the fuse panel from inside the car. Once you have it loose, you can pull it out a ways so you can actually work on it. 2. From the back side one can remove and pull the clips out one at a time. Pull only one out and note where it goes back in. Use a Dremel tool with a wire brush attachment and clean the clip up. Reinstall and move on to the next clip and repeat. I did this to my car and it was super easy.
I like what Craig had to say and I would like to add one thing ................. google a product called ACF-50 .............. it is widely used in the aviation world to keep the thousands of wiring connections in a jumbo jet free of corrosion. Even used on airframe corrosion. I would get a small bottle of this to treat the contacts after cleaning. I'm lucky, as they give away small sample bottles at AirVenture in Oshkosh. Definitely one of my must have products for my tool box. I suggest too that you get a soldering gun, some electrical solder (not plumbing - they're different) and some of the shrink tubing. You will find wires that need repair when working on your harness and this is the way to go. Easy to do and a skill you will quickly learn. If there is no room for a shrink tube where you are working, there is a brush on liquid electrical tape that is great for sealing bare wire connections.
