Throw it away. You don't need another. They're transit packing. When the long bolts were taken out when it was delivered, these tubes fell out to the base.
Prima LPR600 isn't Bosch it's a Whirlpool. Don't know about the 450. Would require all the details from the rating plate to try and work out manufacturer.
You should have received a rewiring sheet with the FHP.
You should be able to turn the existing plug through 180 deg and plug it into the FHP motor. (A bit of force as the keyways don't line up). Remember to check which pins are used on the FHP.
Use a red marker pen to mark the top of the plug...
If it's a Ceset motor you can order the pump on it's own. Down side is, it's the same price as the motor and pump complete.
If it's an Askol, you can't buy any parts for it, it's replaced with a Ceset.
As to how it works, part of the heater box is the alternating valve, it's an electrically controlled motor.
bottom basket 60 sec. / top basket 55 sec., changeover lasts approx. 5 sec
Now you know why you were quoted for a new facia. The plastic lugs will in all probability snap when you try to remove the facia. Have a good look at the facia and you'll see how it snaps into place.
Check out the hotpoint website.
Here's the copy and paste from there.
Our fully trained Hotpoint engineers can fix your appliance for a one off repair charge that includes:
Call out
All parts
All labour
Repair charges from as little as £89.98 including VAT
Our...
Trying to dry a full load instead of half the load.
Condenser partially blocked.
Not taking in cold water to condense the steam.
Any of the above can cause your problem.