I used Molex connectors for many of the low current connections behind the dash because they are much more compact than weatherpack connectors, but they are limited in how much current they can carry. There are many different Molex connectors. I chose to use the Mini-Fit connectors, which are limited to 9A per pin, so more than enough for things like gauge lighting and sending units but definitely not for seat heater power, charging ports, etc. For those I used weatherpack connectors. If you want to incorporate some Molex Mini-Fit connectors to save a little space, you're welcome to borrow my crimper if you need it. It wasn't cheap, but it works well (after a bit of a learning curve).