Besides from duct taping ports to your box, (you know who you are), Any one else have any budget tips to share? Well heres mine for D-Blocks I came up with after refusing to pay the $15-$20 each they want for em. BTW, I need like 6-8 D-Blocks, hence the work around.
In the first pic, its a grounding bar for home electrical panels. With a little mods, it will take a 4 AWG in each terminal.
Next is a 0/1 terminal connector. 3- 0/1 in/out, Simply put your wire in the battery post, and hammer tite. and use the front for a single wire. I got the kind with the 4awg on it allready, and I just strip back the insulation on the 0/1, and clamp it on for a tap of such.