55.2-59 Emergency Park Brake Question

[QBRacing]

When I got my 58 it was all pretty much dismantled and now I'm slowly piecing it back together.

I have found these parts (first pic) which are all under body bits (except the lever rod). I thought that went to some sort of pivot point in the engine bay (that I dont have) and somehow that connected to the cable???.

I was lucky enough to look at one the other day but his is already modified (i think). he has a rosejoint at the handle end and some fancy connector at the firewall (pics 2 and 3). is that joint normal or does anyone know what it's off????

he did away with the pivot an incab hard rod and as I have nothing ild like to try replicate that if possible