Still not sure i'm getting how the jumpers from the pcp connect into the dslam. So in a normal adsl setup, I understand the twisted pair would come from the exchange into the pcp's e-side and then leave from the pcp's d-side to the customer.

But with fttc, we obviously have fibe optic coming into the dslam, but this is where things get murky for me. What route is taken here? Also exactly where is the vdsl signal injected? Thanks.

The line is intercepted in the PCP, a tie pair is connected to the E side and takes it into the DSLAM where the VDSL is inserted, then another tie pair takes line back to the PCP where it connects to the D side pair and to the end user.

(Adding for the questioner).

With a patch panel in the PCP permanently connected to the DSLAM, so the engineer doesn't need to access the FTTC cabinet. This being one of the reasons some very old PCPs were re-shelled, to make room for the patch panel.