The first piece goes on the frame. What a milestone; I am putting the car together!
What we see here is that the upper fulcrum is mounted with the convex side of the curve toward the engine. Note that the inner bolts thread into the tower (which has a thicker area to receive them), while the outer bolts have corresponding nuts.
Also quite obvious in this picture are the "Prothane" bushings. After taking the picture, I discovered that you can't really put them on the pins, then mount the upper arms, then mount the outer bushings. You just can't do it. Put both bushings in the arm, THEN put the assembly on the fulcrum pin. This bushing set came with some kind of silicone goo lubricant but it still squeaked so I ended up resorting to plain old grease.
The upper wishbone arms have been swung up and out of the way for the sake of this picture.

This shows that it is (just) possible to use McPherson strut compressors to get  the front coils of a TR3 in place. Note how the one one the right is as tight as it can go. You can also see how it's clamping the sheet metal of the shock tower between itself and the spring - and so my paint job was already hacked up. 

WARNING, WARNING, WARNING!! This is a very dangerous operation! If the works flew apart and hit you in the head it could be the end of you; there is a lot of kinetic energy stored there just waiting to escape.

You can also see the aluminum spacer that goes above the spring, as well as the rubber insulator, or "packing", as it's known. The aluminum spacer will end up just about out of sight once the spring pushes it home. One of these rubber pieces goes above the aluminum, one below, and one at the bottom of the spring as well, so you need six in total.  However - if you get the modern replacement springs that are a bit stiffer than stock, they may be longer i.e. designed such that no aluminum spacer is needed. In this case you would only need four of the rubber packing pieces.

Here is something a bit tricky: without the weight of the engine or body, or with the frame up on blocks, when you want to connect the vertical link to the upper ball joint....you have to use a spring compressor again.