A 82 series II spider, when I got it both wiper blades were missing from the arms. So just went to store and the blades they show will not work on the arms, it looks like the plastic ends come off but they will not budge and I do not want to break them. Does this look right?

Surplus to my needs after running a very long rally last week, these parts were never used or taken out of their bags. Originally acquired by me from Highwoods Alfa.com the wiper arms are for GTV, GT Jr. and Spider, are 14.25" long tip to tip and their respective new blade assemblies are 15.50"...

I searched the Forum and found a thread about wiper blade sizes for the GTV6, but none discussing this specific issue. I have a 1985 GTV6. The wiper arms appear to end in a simple "blade" style ending. But as it appears to me, some kind of adapter was attached to the simple blade end...