I'm building a motor driver for automotive (12V ~5A) motors which I guess will have current spikes up to 30-40A when the motors switch on. I'm going to use a DPDT relay to pull the motors out of the manual control switches and drive with a transistor H-Bridge. What I'm wondering about is what sort of proto board can I attach the 12V portions of the circuit to which can handle the current? Most automotive relays have these big spade lugs, but there are relay sockets with through hole pins. It would be nice to not have all of the relays hanging on the pigtails you see most often for auto applications, but are there special considerations for the circuit board? I'm not going to do a custom pcb, instead want to use a proto board and soldered wires and screw or spring connectors.
Mechanically fix the relays to something solid. Then use perforated board to mount the FETs on (not strip board unless you beef up the strips with tined copper wire). Finally wire it up with multi stranded wire.