That repair is completely wrong according to the Bubba Smith Weekend Engineers' Repair Klub, (BSWERK, Inc.) for a couple of reasons:

A. Someone SOLDERED the repair. Remember guys, hot soldering irons and excessive alcohol doesn't mix! Booze and large flaming bonfires, sure, but soldering irons? Someone could get hurt or spill a drink.

The authorized method is to strip back about 6 inches of insulation, poke the smaller wire through the strands of the larger wire, mangle it all together to create a sort of connection and wrap with aluminum foil, preferably the liner from either your "chaw" package, cigarette pack or the shiny label from your liquor bottle. Tie a shop rag around the splice loosely and hold the wire away from the engine using a bit of metal baling wire. Be sure to twist the wire tightly so it embeds itself into the shop towel and attach it to a metal part of the engine near the exhaust manifolds. Fuel lines make an excellent choice.