I'm wiring in some accessories to my vehicle and my 1990 car has a basic fuse box with a plastic cover. On removing the cover I've discovered each fuse holder has a terminal which would be ideal for connecting a spade connector to tap into the relevant circuits (side lights and ignition on).
Thing is if I do this I will have to either leave the fuse box cover off or drill a couple of holes so I can withdraw the cover and also pull the wire and spade out completely if I ever want to.
It's at the back corner of the engine bay sheltered by a recess between the wheel arch and bulkhead/firewall and I will probably try and find a rubber grommet to fit around the hole to try and seal it off but obviously it won't be 100% watertight (I doubt the plastic cover is anyway).
Is this a bad idea?