Roy is on the right track......
E.Trailer has kits for adding/extending trailer plugs.
LINKThis one is a direct extension from bumper to truck bed....has 8' harness so you can mount in front of bed.
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31