1995 Dodge Ram Car radio

Rather than cut the wires and wire it in directly it is a better idea to buy an electrical adaptor that you splice to the connector on the aftermarket radio, and will plug in directly to the stock plug that plugs into the stock radio.
You will also need the universal radio mounting kit, so I'll list part numbers for those too.
Only 2 companies that I know of sell these harnesses, so I will list them both:

Scosche part numbers:
Dash install kit: FCJ1276A
Harness kit: CR012

Metra Part numbers:
Wire Kit: 70-1817
Dash install kit they offer 3:
Premium Kit 99-6501
Budget Kit 99-6500
Custom Kit 99-6700

I hope this information helps!