A while ago in this thread I mentioned a wiper assembly modification where you could use something more flexible than the bundy tube Here it is in more detail.
These are the components.
L-R Convoluted stainless steel gas pipe (very flexible. I got my Gas tube from here https://www.ebay.co.uk/itm/325145468146 ) The fixing nut (motor end) and the ends off your original (bent out of shape?) budy tube.
Bit fuzzy, sorry. Shorten your bundy end to match the end length of the Gas tube, ish. Using a round file, file the internal diameter of the gas pipe end until the you can gently hammer/tap in the cut bundy end. Patience is you friend here, needs to be an interferance fit, not lose.
Like so
At the wheel box end once fitted it will look like this. Nice and secure
Now for the motor end you do the same. BUT before you tap in your cut bundy end make sure you attach the fixing nut! You will need to file the internal small end of the nut to get it over the gas pipe end. If you come in from the small end of the nut while filing you wont interfere with the threads. Once done it will look like this.
Attach one end of your newly modified assembly to the wheel box and the other end to you motor assembly, like so. Not forgetting, of course, to grease everything thoroughly
What you now have is an assembly with a tube that is extremely easy to route round the rear of the car.
Now give yourself a pat on the back for a job well done and go and go get a cup of tea.
Roland