Adding fuses and a relay to stock fusebox

Im planning to add some circuitry to power a two sets of additional lights, and would like to add a relay and a fuse to the existing fuse box, as there are already B+ and ground sources in place.

As you can see there are two empty relay spots. The lower one already has a B+ post installed, and takes a square relay similar to the starter relay. The one where I am pointing takes a standard relay similar to the EFI relay.



There are also several fuse locations, some have power, some dont. In any case, i would like to utilize these.

What tools, pins, etc would i need to add OEM like terminals to the fuse box?

 

hard to say, there are a few different designs of snap in terminals so if you took one out you might be able to match it up "if" you had a supply house that had it. chances are its not something you can find just anywhere. these might fit but then they may not:http://www.ebay.com/itm/10-Pcs-6-3m...e-Connector-/230917665565?hash=item35c3c3f31d

I suggest it is simpler and better to just skip trying to make use of unused sections of the fuse box and use one of these: http://www.ebay.com/itm/car-relay-1...054?pt=LH_DefaultDomain_0&hash=item2c983dfbf6

even if you managed to make use of those relay connections, those relays are very expensive, something like $10-$15 each

 

Does anyone know what snaps into this open space in the fuse box? I thought i found a relay holder off a 4runner that would work, but the tab is recessed. This would need to stick out.