Serpentine belt snapped, broke Oil Sending Unit.

Car was running fine before this happened, would start every time regardless of temperature outside. I've since... sorta replaced the sending unit and belt. The belt snapped and took the entire unit with it leaving just the bolt end and a nub of plastic left lol. It also snapped the wire leading to this so I now have no plug end and had to basically solder to the pin down inside and solder the wire to what was left on the other side. Anyone know of a replacement wire with the plug that goes into the sending unit? The car no longer starts after replacing these items. It cranks but it cranks kinda... weird. Like 1 turn every 3/4 a second. Slow cranks kinda. Hard to describe. I have all lights and am getting power. I can measure the voltage tomorrow after work when I can and update it. I did try jumping and nothing worked. Are there things in the general area of the belt that it possibly took out? I know space is tight so it's hard to tell. Thanks for the help!