Tone arm plug in RCA cable?

Yes, but what I and others are saying is he is better off getting rid of the box entirely.  Just go DIN at the arm base to RCA at the phono stage, which can very easily be achieved and would cost no more than buying RCA to RCA conventional interconnects, wire quality notwithstanding.  If Holmz has a "mini-DIN" connection at the tonearm (suggested by Elliot), which I have never seen, then I am still pretty confident the same idea can be made to work.  I do realize that buying a whole new DIN to RCA IC is going to cost more than just replacing that short run of wire from the DIN plug to the box, but I believe it's a worthy use of $$$.  Otherwise, yes, use "better wire" of choice between DIN and box.  There is some soldering skill and knowledge of what goes where needed to re-wire a DIN plug; paying someone else to do it would negate the cost savings of keeping the box.

@holmz : Please follow the @lewm and other gentleman advise. You don’t need the PIB..

" I need to try a different search engine. "

I think not, what you need is to follow trusty audiophiles that give you " solutions on hand " and stop to follow stupid posts.

R.

If the OP wants to replace the Cable used for the PIB - 1, the method when used will add one more set of connections and disruption in the signal path.

Causing this condition is usually one that is avoided and attempts are made to keep the connections to the minimum required.

If this is the only option the OP is considering, a Pure Copper Zavfino DIN Plug and the Chassis Mount  Pure Copper WBT reduced eddy RCA's will be a good start for the connections.

These parts 'could' be attached to the box, which will remove the need for the length of cable to be utilised. The additional Space that may be required under the TT to achieve this would need to be addressed.

A length of Cable with PC Triple C or D.U.C.C Wire will be a cable worth experiencing, if the Cable has to remain used with the box, either of these Cables will most likely be kept and expanded on in use as umbilical's at other interfaces.       

Pindac, You wrote, "If the OP wants to replace the Cable used for the PIB - 1, the method when used will add one more set of connections and disruption in the signal path."  I beg to differ.  He is already using the box, so changing the wires between the DIN plug and the box will not add physical connectors in the signal path. That will not change.  However, by eliminating the box interface, then he can reduce the existing number of physical connections in the signal path.

I gather you have strong opinions on what kind of wire sounds best.  So do many of us, but I think getting rid of the box is the main thing,

@holmz  : " I have a tone arm with a connector that plugs into the bottom of the arm.."

Which tonearm and which kind of connector it has? for what you posted  the tonearm output connector is a DIN Pin5.

@imhififan ​​​​​@yogiboy  already gave the solution.

" Is there any meaningful sonic advantage in going direct from DIN to phono stage? "

Absolutely, you need to go directly to the phono stage with nothing in between the DIN PIN 5 output connector and the input at PS other that the IC cable that those two gentlemans already posted and gave you the link ! ? ? !!

R.