Can I use a Jumper for Multiple Relays?

[orange150]

For wiring multiple relays, can I use a jumper wire for the battery power to the fuses?

I think I'm going to use one of these:

Ideally I would like to use one power wire jumped to each fuse which then feed to the 30 pole on their corresponding relays.

Similarly for the in cab switches; I'm assuming I can use one power source jumped to all the switches, which then distributes out to its corresponding 86 pole on each relay.

 

[orange150]

Now that I'm thinking about it, would the same apply for the grounds from the relays?

That same company sells a distribution block, just trying to figure out if it's actually necessary.

 

[YOUNGBLOOD13]

Use the block. If you use one wire to jump all the fuses, then ALL the current goes through the one wire. Rhymes with fire