I fear the PCV clip is grossly over simplified, particularly for porch awnings. These seem to have many more parts to the framework than full awnings and with handed joints, so it matters completely what goes where.
The best advice I can offer is to choose a calm day, when everyone is in a calm frame of mind, and start calmly by reading whatever instructions are provided.
Then, when you are sure you have got it right and before relaxing wiht large G&T have to hand at least three different colours of insulation tape and colour code each side of each joint in unique bands of coloured tape. Then, still beforethe G&T, draw a reasonable sketch of the framework and write down the colour coding you have just applied. Make sure you know whether B means black or brown or blue.
Next time out, remove all front and side panels from the roof and main canvas. Fit this into the awning rail and position approximately. Then assemble frame as far as possible in front of the hanging awning. Then walk it under the roof panels and tie in the side poles nearest to the caravan with the tapes, velco etc. provided.
Get the frame more or less into shape and put down a coupe of guy lines at thefront to keep it from collapsing against the caravan.
Add side and front panels doing the upwind end / side first.
Tension frame again, then peg down pars nearest to caravan and work outwards.
Retension and repeg as necessary. Understand why porch awnings are also know as 'divorce in a bag'