Nº 1 or Nº4

Hello, when putting a distribution strap in Peugeot Diesel 306 Djy with the 3 fixers (camshaft, crankshaft and injection pump) if we release the rocker lid we see that the cylinder side of Correa Distribution is the one that is in PMS in compression time while naturalmelant the nº4 is at crossing. Now comes the question, what cylinder do we take with the comparator the static advance of the injection pump? Flying side or straps side?
Greetings from Tashunka.