My Amazon didn't have a windshield washer installed when I got it. (I'm not sure if US-market Amazons didn't come equipped with washers, or if it was removed by the previous owner?) Being cheap, I wasn't about to pay a hundred odd dollars for a genuine Volvo setup.
During my last trip to the wrecking yard, I picked a $10 washer reservoir and pump out of a 70's era Toyota pickup. (Side note: it's surprisingly difficult to find a simple, no-frills washer tank and pump. Vehicles made after 1980 seem to employ incredibly labyrinthine washer tank designs.)
I made a bracket for the washer tank out of some 1/16" steel bar and fixed it to the driver's side radiator mounting.
The wiring harness already had a lead for the washer pump located near the voltage regulator on the passenger side. It supplies +12 volts to the pump when the wiper switch is pulled fully out. I connected the other lead of the pump motor to a good chassis ground.
I ran about 6' of new 9/32" tubing from the pump through an opening in the firewall (I used the temperature gauge sender opening), into a 3/16"x1/8" x 1/8" tee, and then into the nozzles via two shorter (about 3' total) lengths of 3/32" tubing.
I used zip-ties to secure snug down the hoses around the nozzles. (Unfortunately, I managed to flood my stereo before realizing this was necessary.)
I can see clearly now, the grime is gone!