If your assembled panel has just a few pins, this solution will not bring much cost-benefit if there are plenty of relays that are next to each other; their installation takes on the simplest things - common power and general connection for all relays. A significantly faster and more readily prepared solution is the block of relays, which are ready-made products with replaceable or reed relays, with indication, safety diodes, fuses, neatly marked connection plates and placeholders. Using this solution saves you time and reduces the chance of human errors to a minimum.